Search

Your search keyword '"Romdhani M"' showing total 137 results
Start Over Author "Romdhani M"
137 results on '"Romdhani M"'

5. Soccer Players' Sleep Quality and Training Load Were Affected by the COVID-19 Lockdown: An International Survey.

Author

Romdhani, M, Washif, JA, Taylor, L, Chamari, K, “Athletes’ Sleep During the Lockdown International Survey” Group Members, Romdhani, M, Washif, JA, Taylor, L, Chamari, K, and “Athletes’ Sleep During the Lockdown International Survey” Group Members

Abstract

BACKGROUND: The effect of the 2020 COVID-19 lockdown on athlete sleep and training behavior is documented, albeit without a worldwide soccer-specific focus. METHOD: Soccer (football) players (N = 1639; 30 countries; age 22.5 [5.7] y; 81% ≤25 y; 56% male; 30% elite; 66% Muslim) answered a retrospective, cross-sectional questionnaire related to their behavioral habits before and during COVID-19 lockdown (survey period July to September 2020), including (1) Pittsburgh Sleep Quality Index PSQI, (2) Insomnia Severity Index (ISI), (3) bespoke questions about training behaviors, and (4) Muslim player focused sleep and training behavior questions. RESULTS: During lockdown (compared to prelockdown), PSQI (P < .001; moderate effect size [ES]) and ISI (P < .001; moderate ES) scores were higher in the overall sample and in elite versus nonelite (PSQI: P < .05; small ES and ISI: P < .001; small ES), >25 years versus ≤25 years (PSQI: P < .01; small ES and ISI: P < .001; moderate ES), females versus males (PSQI: P < .001; small ES), <1 month versus >1 month lockdown (PSQI: P < .05; small ES and ISI: P < .05; small ES), and players maintaining versus reducing training intensity (PSQI: P < .001; moderate ES and ISI: P < .001; small ES). Muslim players (41%) reported unfavorable sleep and/or training behaviors during Ramadan in lockdown compared to lockdown outside of Ramadan. CONCLUSIONS: Specific subgroups appear more vulnerable to lockdown effects, with training-intensity maintenance moderating negative effects relative to sleep. Policy and support (respectful of subgroup nuances) during lockdown-like challenges that facilitate training (including intensity) appear prudent, given their favorable relationship with sleep, mental health, and physical health, in the present data and elsewhere.

Published
2023

7. Hardware/Software co-design

Author

Jerraya, A., Daveau, J.M., Marchioro, G., Valderrama, C., Romdhani, M., Ismail, T. Ben, Zergainoh, N.E., Hessel, F., Coste, P., Marrec, Ph. Le, Baghdadi, A., Gauthier, L., Reis, Ricardo, editor, Lubaszewski, Marcelo, editor, and Jess, Jochen A.G., editor

Published
2007
Full Text
View/download PDF

9. Training During the COVID-19 Lockdown: Knowledge, Beliefs, and Practices of 12,526 Athletes from 142 Countries and Six Continents

Author

Washif, JA, Farooq, A, Krug, I, Pyne, DB, Verhagen, E, Taylor, L, Wong, DP, Mujika, I, Cortis, C, Haddad, M, Ahmadian, O, Al Jufaili, M, Al-Horani, RA, Al-Mohannadi, AS, Aloui, A, Ammar, A, Arifi, F, Aziz, AR, Batuev, M, Beaven, CM, Beneke, R, Bici, A, Bishnoi, P, Bogwasi, L, Bok, D, Boukhris, O, Boullosa, D, Bragazzi, N, Brito, J, Palacios Cartagena, RP, Chaouachi, A, Cheung, SS, Chtourou, H, Cosma, G, Debevec, T, DeLang, MD, Dellal, A, Donmez, G, Driss, T, Duque, JDP, Eirale, C, Elloumi, M, Foster, C, Franchini, E, Fusco, A, Galy, O, Gastin, PB, Gill, N, Girard, O, Gregov, C, Halson, S, Hammouda, O, Hanzlikova, I, Hassanmirzaei, B, Haugen, T, Hebert-Losier, K, Munoz Helu, H, Herrera-Valenzuela, T, Hettinga, FJ, Holtzhausen, L, Hue, O, Dello Iacono, A, Ihalainen, JK, James, C, van Rensburg, DCJ, Joseph, S, Kamoun, K, Khaled, M, Khalladi, K, Kim, KJ, Kok, L-Y, MacMillan, L, Mataruna-Dos-Santos, LJ, Matsunaga, R, Memishi, S, Millet, GP, Moussa-Chamari, I, Musa, DI, Hoang, MTN, Nikolaidis, PT, Owen, A, Padulo, J, Pagaduan, JC, Perera, NP, Perez-Gomez, J, Pillay, L, Popa, A, Pudasaini, A, Rabbani, A, Rahayu, T, Romdhani, M, Salamh, P, Sarkar, A-S, Schillinger, A, Seiler, S, Setyawati, H, Shrestha, N, Suraya, F, Tabben, M, Trabelsi, K, Urhausen, A, Valtonen, M, Weber, J, Whiteley, R, Zrane, A, Zerguini, Y, Zmijewski, P, Sandbakk, O, Ben Saad, H, Chamari, K, Washif, JA, Farooq, A, Krug, I, Pyne, DB, Verhagen, E, Taylor, L, Wong, DP, Mujika, I, Cortis, C, Haddad, M, Ahmadian, O, Al Jufaili, M, Al-Horani, RA, Al-Mohannadi, AS, Aloui, A, Ammar, A, Arifi, F, Aziz, AR, Batuev, M, Beaven, CM, Beneke, R, Bici, A, Bishnoi, P, Bogwasi, L, Bok, D, Boukhris, O, Boullosa, D, Bragazzi, N, Brito, J, Palacios Cartagena, RP, Chaouachi, A, Cheung, SS, Chtourou, H, Cosma, G, Debevec, T, DeLang, MD, Dellal, A, Donmez, G, Driss, T, Duque, JDP, Eirale, C, Elloumi, M, Foster, C, Franchini, E, Fusco, A, Galy, O, Gastin, PB, Gill, N, Girard, O, Gregov, C, Halson, S, Hammouda, O, Hanzlikova, I, Hassanmirzaei, B, Haugen, T, Hebert-Losier, K, Munoz Helu, H, Herrera-Valenzuela, T, Hettinga, FJ, Holtzhausen, L, Hue, O, Dello Iacono, A, Ihalainen, JK, James, C, van Rensburg, DCJ, Joseph, S, Kamoun, K, Khaled, M, Khalladi, K, Kim, KJ, Kok, L-Y, MacMillan, L, Mataruna-Dos-Santos, LJ, Matsunaga, R, Memishi, S, Millet, GP, Moussa-Chamari, I, Musa, DI, Hoang, MTN, Nikolaidis, PT, Owen, A, Padulo, J, Pagaduan, JC, Perera, NP, Perez-Gomez, J, Pillay, L, Popa, A, Pudasaini, A, Rabbani, A, Rahayu, T, Romdhani, M, Salamh, P, Sarkar, A-S, Schillinger, A, Seiler, S, Setyawati, H, Shrestha, N, Suraya, F, Tabben, M, Trabelsi, K, Urhausen, A, Valtonen, M, Weber, J, Whiteley, R, Zrane, A, Zerguini, Y, Zmijewski, P, Sandbakk, O, Ben Saad, H, and Chamari, K

Abstract

OBJECTIVE: Our objective was to explore the training-related knowledge, beliefs, and practices of athletes and the influence of lockdowns in response to the coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). METHODS: Athletes (n = 12,526, comprising 13% world class, 21% international, 36% national, 24% state, and 6% recreational) completed an online survey that was available from 17 May to 5 July 2020 and explored their training behaviors (training knowledge, beliefs/attitudes, and practices), including specific questions on their training intensity, frequency, and session duration before and during lockdown (March-June 2020). RESULTS: Overall, 85% of athletes wanted to "maintain training," and 79% disagreed with the statement that it is "okay to not train during lockdown," with a greater prevalence for both in higher-level athletes. In total, 60% of athletes considered "coaching by correspondence (remote coaching)" to be sufficient (highest amongst world-class athletes). During lockdown, < 40% were able to maintain sport-specific training (e.g., long endurance [39%], interval training [35%], weightlifting [33%], plyometric exercise [30%]) at pre-lockdown levels (higher among world-class, international, and national athletes), with most (83%) training for "general fitness and health maintenance" during lockdown. Athletes trained alone (80%) and focused on bodyweight (65%) and cardiovascular (59%) exercise/training during lockdown. Compared with before lockdown, most athletes reported reduced training frequency (from between five and seven sessions per week to four or fewer), shorter training sessions (from ≥ 60 to < 60 min), and lower sport-specific intensity (~ 38% reduction), irrespective of athlete classification. CONCLUSIONS: COVID-19-related lockdowns saw marked reductions in athletic training specificity, intensity, frequency, and duration, with notable within-sample differences (by athlete clas

Published
2022

10. Training During the COVID-19 Lockdown: Knowledge, Beliefs, and Practices of 12,526 Athletes from 142 Countries and Six Continents (vol 52, pg 933, 2021)

Author

Washif, JA, Farooq, A, Krug, I, Pyne, DB, Verhagen, E, Taylor, L, Wong, DP, Mujika, I, Cortis, C, Haddad, M, Ahmadian, O, Al Jufaili, M, Al-Horani, RA, Al-Mohannadi, AS, Aloui, A, Ammar, A, Arifi, F, Aziz, AR, Batuev, M, Beaven, CM, Beneke, R, Bici, A, Bishnoi, P, Bogwasi, L, Bok, D, Boukhris, O, Boullosa, D, Bragazzi, N, Brito, J, Cartagena, RPP, Chaouachi, A, Cheung, SS, Chtourou, H, Cosma, G, Debevec, T, DeLang, MD, Dellal, A, Donmez, G, Driss, T, Pena Duque, JD, Eirale, C, Elloumi, M, Foster, C, Franchini, E, Fusco, A, Galy, O, Gastin, PB, Gill, N, Girard, O, Gregov, C, Halson, S, Hammouda, O, Hanzlikova, I, Hassanmirzaei, B, Haugen, T, Hebert-Losier, K, Munoz Helu, H, Herrera-Valenzuela, T, Hettinga, FJ, Holtzhausen, L, Hue, O, Dello Iacono, A, Ihalainen, JK, James, C, Janse van Rensburg, DC, Joseph, S, Kamoun, K, Khaled, M, Khalladi, K, Kim, KJ, Kok, L-Y, MacMillan, L, Mataruna-Dos-Santos, LJ, Matsunaga, R, Memishi, S, Millet, GP, Moussa-Chamari, I, Musa, DI, Nguyen, HMT, Nikolaidis, PT, Owen, A, Padulo, J, Pagaduan, JC, Perera, NP, Perez-Gomez, J, Pillay, L, Popa, A, Pudasaini, A, Rabbani, A, Rahayu, T, Romdhani, M, Salamh, P, Sarkar, A-S, Schillinger, A, Seiler, S, Setyawati, H, Shrestha, N, Suraya, F, Tabben, M, Trabelsi, K, Urhausen, A, Valtonen, M, Weber, J, Whiteley, R, Zrane, A, Zerguini, Y, Zmijewski, P, Sandbakk, O, Ben Saad, H, Chamari, K, Washif, JA, Farooq, A, Krug, I, Pyne, DB, Verhagen, E, Taylor, L, Wong, DP, Mujika, I, Cortis, C, Haddad, M, Ahmadian, O, Al Jufaili, M, Al-Horani, RA, Al-Mohannadi, AS, Aloui, A, Ammar, A, Arifi, F, Aziz, AR, Batuev, M, Beaven, CM, Beneke, R, Bici, A, Bishnoi, P, Bogwasi, L, Bok, D, Boukhris, O, Boullosa, D, Bragazzi, N, Brito, J, Cartagena, RPP, Chaouachi, A, Cheung, SS, Chtourou, H, Cosma, G, Debevec, T, DeLang, MD, Dellal, A, Donmez, G, Driss, T, Pena Duque, JD, Eirale, C, Elloumi, M, Foster, C, Franchini, E, Fusco, A, Galy, O, Gastin, PB, Gill, N, Girard, O, Gregov, C, Halson, S, Hammouda, O, Hanzlikova, I, Hassanmirzaei, B, Haugen, T, Hebert-Losier, K, Munoz Helu, H, Herrera-Valenzuela, T, Hettinga, FJ, Holtzhausen, L, Hue, O, Dello Iacono, A, Ihalainen, JK, James, C, Janse van Rensburg, DC, Joseph, S, Kamoun, K, Khaled, M, Khalladi, K, Kim, KJ, Kok, L-Y, MacMillan, L, Mataruna-Dos-Santos, LJ, Matsunaga, R, Memishi, S, Millet, GP, Moussa-Chamari, I, Musa, DI, Nguyen, HMT, Nikolaidis, PT, Owen, A, Padulo, J, Pagaduan, JC, Perera, NP, Perez-Gomez, J, Pillay, L, Popa, A, Pudasaini, A, Rabbani, A, Rahayu, T, Romdhani, M, Salamh, P, Sarkar, A-S, Schillinger, A, Seiler, S, Setyawati, H, Shrestha, N, Suraya, F, Tabben, M, Trabelsi, K, Urhausen, A, Valtonen, M, Weber, J, Whiteley, R, Zrane, A, Zerguini, Y, Zmijewski, P, Sandbakk, O, Ben Saad, H, and Chamari, K

Published
2022

11. Ramadan intermittent fasting induced poorer training practices during the COVID-19 lockdown: A global cross-sectional study with 5529 athletes from 110 countries

Author

Washif, JA, Pyne, DB, Sandbakk, O, Trabelsi, K, Aziz, AR, Beaven, CM, Krug, I, Mujika, I, Ammar, A, Chaouachi, A, Moussa-Chamari, I, Aloui, A, Chtourou, H, Farooq, A, Haddad, M, Romdhani, M, Salamh, P, Tabben, M, Wong, DP, Zerguini, Y, DeLang, MD, Taylor, L, Ben Saad, H, Chamari, K, Washif, JA, Pyne, DB, Sandbakk, O, Trabelsi, K, Aziz, AR, Beaven, CM, Krug, I, Mujika, I, Ammar, A, Chaouachi, A, Moussa-Chamari, I, Aloui, A, Chtourou, H, Farooq, A, Haddad, M, Romdhani, M, Salamh, P, Tabben, M, Wong, DP, Zerguini, Y, DeLang, MD, Taylor, L, Ben Saad, H, and Chamari, K

Abstract

Ramadan intermittent fasting during the COVID-19 lockdown (RIFL) may present unique demands. We investigated training practices (i.e., training load and training times) of athletes, using pre-defined survey criteria/questions, during the 'first' COVID-19 lockdown, comparing RIFL to lockdown-alone (LD) in Muslim athletes. Specifically, a within-subject, survey-based study saw athletes (n = 5,529; from 110 countries/territories) training practices (comparing RIFL to LD) explored by comparative variables of: sex; age; continent; athlete classification (e.g., world-class); sport classification (e.g., endurance); athlete status (e.g., professional); and level of training knowledge and beliefs/attitudes (ranked as: good/moderate/poor). During RIFL (compared to LD), athlete perceptions (ranges presented given variety of comparative variables) of their training load decreased (46-62%), were maintained (31-48%) or increased (2-13%). Decreases (≥ 5%, p < 0.05) affected more athletes aged 30-39 years than those 18-29 years (60 vs 55%); more national than international athletes (59 vs 51%); more team sports than precision sports (59 vs 46%); more North American than European athletes (62 vs 53%); more semi-professional than professional athletes (60 vs 54%); more athletes who rated their beliefs/attitudes 'good' compared to 'poor' and 'moderate' (61 vs 54 and 53%, respectively); and more athletes with 'moderate' than 'poor' knowledge (58 vs 53%). During RIFL, athletes had different strategies for training times, with 13-29% training twice a day (i.e., afternoon and night), 12-26% at night only, and 18-36% in the afternoon only, with ranges depending on the comparative variables. Training loads and activities were altered negatively during RIFL compared to LD. It would be prudent for decision-makers responsible for RIFL athletes to develop programs to support athletes during such challenges.

Published
2022

12. COVID-19 Lockdown: A Global Study Investigating the Effect of Athletes' Sport Classification and Sex on Training Practices.

Author

Washif, JA, Sandbakk, Ø, Seiler, S, Haugen, T, Farooq, A, Quarrie, K, Janse van Rensburg, DC, Krug, I, Verhagen, E, Wong, DP, Mujika, I, Musa, DI, Nguyen, HMT, Nikolaidis, PT, Owen, A, Padulo, J, Pagaduan, JC, Perera, NP, Pérez-Gómez, J, Pillay, L, Popa, A, Rabbani, A, Pudasaini, A, Rahayu, T, Romdhani, M, Salamh, P, Sarkar, A-S, Schillinger, A, Setyawati, H, Shrestha, N, Suraya, F, Tabben, M, Urhausen, A, Trabelsi, K, Valtonen, M, Weber, J, Whiteley, R, Zrane, A, Zerguini, Y, Zmijewski, P, Ben Saad, H, Pyne, DB, Taylor, L, Cortis, C, Chamari, K, Haddad, M, Ahmadian, O, Al Jufaili, M, Al-Horani, RA, Al-Mohannadi, AS, Aloui, A, Ammar, A, Arifi, F, Aziz, AR, Batuev, M, Beaven, CM, Beneke, R, Bici, A, Bishnoi, P, Bogwasi, L, Bok, D, Boukhris, O, Boullosa, D, Bragazzi, N, Brito, J, Palacios Cartagena, RP, Chaouachi, A, Cheung, SS, Chtourou, H, Cosma, G, Debevec, T, DeLang, MD, Dellal, A, Dönmez, G, Driss, T, Peña Duque, JD, Eirale, C, Elloumi, M, Foster, C, Franchini, E, Fusco, A, Galy, O, Gastin, PB, Gill, N, Girard, O, Gregov, C, Halson, S, Hammouda, O, Hanzlíková, I, Hassanmirzaei, B, Hébert-Losier, K, Muñoz Helú, H, Herrera-Valenzuela, T, Hettinga, FJ, Holtzhausen, L, Hue, O, Dello Iacono, A, Ihalainen, JK, James, C, Joseph, S, Kamoun, K, Khaled, M, Khalladi, K, Kim, KJ, Kok, L-Y, MacMillan, L, Mataruna-Dos-Santos, LJ, Matsunaga, R, Memishi, S, Millet, GP, Moussa-Chamari, I, Washif, JA, Sandbakk, Ø, Seiler, S, Haugen, T, Farooq, A, Quarrie, K, Janse van Rensburg, DC, Krug, I, Verhagen, E, Wong, DP, Mujika, I, Musa, DI, Nguyen, HMT, Nikolaidis, PT, Owen, A, Padulo, J, Pagaduan, JC, Perera, NP, Pérez-Gómez, J, Pillay, L, Popa, A, Rabbani, A, Pudasaini, A, Rahayu, T, Romdhani, M, Salamh, P, Sarkar, A-S, Schillinger, A, Setyawati, H, Shrestha, N, Suraya, F, Tabben, M, Urhausen, A, Trabelsi, K, Valtonen, M, Weber, J, Whiteley, R, Zrane, A, Zerguini, Y, Zmijewski, P, Ben Saad, H, Pyne, DB, Taylor, L, Cortis, C, Chamari, K, Haddad, M, Ahmadian, O, Al Jufaili, M, Al-Horani, RA, Al-Mohannadi, AS, Aloui, A, Ammar, A, Arifi, F, Aziz, AR, Batuev, M, Beaven, CM, Beneke, R, Bici, A, Bishnoi, P, Bogwasi, L, Bok, D, Boukhris, O, Boullosa, D, Bragazzi, N, Brito, J, Palacios Cartagena, RP, Chaouachi, A, Cheung, SS, Chtourou, H, Cosma, G, Debevec, T, DeLang, MD, Dellal, A, Dönmez, G, Driss, T, Peña Duque, JD, Eirale, C, Elloumi, M, Foster, C, Franchini, E, Fusco, A, Galy, O, Gastin, PB, Gill, N, Girard, O, Gregov, C, Halson, S, Hammouda, O, Hanzlíková, I, Hassanmirzaei, B, Hébert-Losier, K, Muñoz Helú, H, Herrera-Valenzuela, T, Hettinga, FJ, Holtzhausen, L, Hue, O, Dello Iacono, A, Ihalainen, JK, James, C, Joseph, S, Kamoun, K, Khaled, M, Khalladi, K, Kim, KJ, Kok, L-Y, MacMillan, L, Mataruna-Dos-Santos, LJ, Matsunaga, R, Memishi, S, Millet, GP, and Moussa-Chamari, I

Abstract

PURPOSE: To investigate differences in athletes' knowledge, beliefs, and training practices during COVID-19 lockdowns with reference to sport classification and sex. This work extends an initial descriptive evaluation focusing on athlete classification. METHODS: Athletes (12,526; 66% male; 142 countries) completed an online survey (May-July 2020) assessing knowledge, beliefs, and practices toward training. Sports were classified as team sports (45%), endurance (20%), power/technical (10%), combat (9%), aquatic (6%), recreational (4%), racquet (3%), precision (2%), parasports (1%), and others (1%). Further analysis by sex was performed. RESULTS: During lockdown, athletes practiced body-weight-based exercises routinely (67% females and 64% males), ranging from 50% (precision) to 78% (parasports). More sport-specific technical skills were performed in combat, parasports, and precision (∼50%) than other sports (∼35%). Most athletes (range: 50% [parasports] to 75% [endurance]) performed cardiorespiratory training (trivial sex differences). Compared to prelockdown, perceived training intensity was reduced by 29% to 41%, depending on sport (largest decline: ∼38% in team sports, unaffected by sex). Some athletes (range: 7%-49%) maintained their training intensity for strength, endurance, speed, plyometric, change-of-direction, and technical training. Athletes who previously trained ≥5 sessions per week reduced their volume (range: 18%-28%) during lockdown. The proportion of athletes (81%) training ≥60 min/session reduced by 31% to 43% during lockdown. Males and females had comparable moderate levels of training knowledge (56% vs 58%) and beliefs/attitudes (54% vs 56%). CONCLUSIONS: Changes in athletes' training practices were sport-specific, with few or no sex differences. Team-based sports were generally more susceptible to changes than individual sports. Policy makers should provide athletes with specific training arrangements and educational resources to facilitate remot

Published
2022

13. Lockdown Duration and Training Intensity Affect Sleep Behavior in an International Sample of 1,454 Elite Athletes.

Author

Romdhani, M, Fullagar, HHK, Vitale, JA, Nédélec, M, Rae, DE, Ammar, A, Chtourou, H, Al Horani, RA, Ben Saad, H, Bragazzi, NL, Dönmez, G, Dergaa, I, Driss, T, Farooq, A, Hammouda, O, Harroum, N, Hassanmirzaei, B, Khalladi, K, Khemila, S, Mataruna-Dos-Santos, LJ, Moussa-Chamari, I, Mujika, I, Muñoz Helú, H, Norouzi Fashkhami, A, Paineiras-Domingos, LL, Khaneghah, MR, Saita, Y, Souissi, N, Trabelsi, K, Washif, JA, Weber, J, Zmijewski, P, Taylor, L, Garbarino, S, Chamari, K, Romdhani, M, Fullagar, HHK, Vitale, JA, Nédélec, M, Rae, DE, Ammar, A, Chtourou, H, Al Horani, RA, Ben Saad, H, Bragazzi, NL, Dönmez, G, Dergaa, I, Driss, T, Farooq, A, Hammouda, O, Harroum, N, Hassanmirzaei, B, Khalladi, K, Khemila, S, Mataruna-Dos-Santos, LJ, Moussa-Chamari, I, Mujika, I, Muñoz Helú, H, Norouzi Fashkhami, A, Paineiras-Domingos, LL, Khaneghah, MR, Saita, Y, Souissi, N, Trabelsi, K, Washif, JA, Weber, J, Zmijewski, P, Taylor, L, Garbarino, S, and Chamari, K

Abstract

Objective: To investigate the effect of 1) lockdown duration and 2) training intensity on sleep quality and insomnia symptoms in elite athletes. Methods: 1,454 elite athletes (24.1 ± 6.7 years; 42% female; 41% individual sports) from 40 countries answered a retrospective, cross-sectional, web-based questionnaire relating to their behavioral habits pre- and during- COVID-19 lockdown, including: 1) Pittsburgh sleep quality index (PSQI); 2) Insomnia severity index (ISI); bespoke questions about 3) napping; and 4) training behaviors. The association between dependent (PSQI and ISI) and independent variables (sleep, napping and training behaviors) was determined with multiple regression and is reported as semi-partial correlation coefficient squared (in percentage). Results: 15% of the sample spent < 1 month, 27% spent 1-2 months and 58% spent > 2 months in lockdown. 29% self-reported maintaining the same training intensity during-lockdown whilst 71% reduced training intensity. PSQI (4.1 ± 2.4 to 5.8 ± 3.1; mean difference (MD): 1.7; 95% confidence interval of the difference (95% CI): 1.6-1.9) and ISI (5.1 ± 4.7 to 7.7 ± 6.4; MD: 2.6; 95% CI: 2.3-2.9) scores were higher during-compared to pre-lockdown, associated (all p < 0.001) with longer sleep onset latency (PSQI: 28%; ISI: 23%), later bedtime (PSQI: 13%; ISI: 14%) and later preferred time of day to train (PSQI: 9%; ISI: 5%) during-lockdown. Those who reduced training intensity during-lockdown showed higher PSQI (p < 0.001; MD: 1.25; 95% CI: 0.87-1.63) and ISI (p < 0.001; MD: 2.5; 95% CI: 1.72-3.27) scores compared to those who maintained training intensity. Although PSQI score was not affected by the lockdown duration, ISI score was higher in athletes who spent > 2 months confined compared to those who spent < 1 month (p < 0.001; MD: 1.28; 95% CI: 0.26-2.3). Conclusion: Reducing training intensity during the COVID-19-induced lockdown was associated with lower sleep quality and higher insomnia severity in elite athlet

Published
2022

19. COVID-19 Lockdowns: A Worldwide Survey of Circadian Rhythms and Sleep Quality in 3911 Athletes from 49 Countries, with Data-Driven Recommendations.

Author

Romdhani, M, Rae, DE, Nédélec, M, Ammar, A, Chtourou, H, Al Horani, R, Ben Saad, H, Bragazzi, N, Dönmez, G, Driss, T, Fullagar, HHK, Farooq, A, Garbarino, S, Hammouda, O, Hassanmirzaei, B, Khalladi, K, Khemila, S, Mataruna-Dos-Santos, LJ, Moussa-Chamari, I, Mujika, I, Muñoz Helú, H, Norouzi Fashkhami, A, Paineiras-Domingos, LL, Rahbari Khaneghah, M, Saita, Y, Trabelsi, K, Vitale, JA, Washif, JA, Weber, J, Souissi, N, Taylor, L, Chamari, K, Romdhani, M, Rae, DE, Nédélec, M, Ammar, A, Chtourou, H, Al Horani, R, Ben Saad, H, Bragazzi, N, Dönmez, G, Driss, T, Fullagar, HHK, Farooq, A, Garbarino, S, Hammouda, O, Hassanmirzaei, B, Khalladi, K, Khemila, S, Mataruna-Dos-Santos, LJ, Moussa-Chamari, I, Mujika, I, Muñoz Helú, H, Norouzi Fashkhami, A, Paineiras-Domingos, LL, Rahbari Khaneghah, M, Saita, Y, Trabelsi, K, Vitale, JA, Washif, JA, Weber, J, Souissi, N, Taylor, L, and Chamari, K

Abstract

OBJECTIVE: In a convenience sample of athletes, we conducted a survey of COVID-19-mediated lockdown (termed 'lockdown' from this point forward) effects on: (i) circadian rhythms; (ii) sleep; (iii) eating; and (iv) training behaviors. METHODS: In total, 3911 athletes [mean age: 25.1 (range 18-61) years, 1764 female (45%), 2427 team-sport (63%) and 1442 elite (37%) athletes] from 49 countries completed a multilingual cross-sectional survey including the Pittsburgh Sleep Quality Index and Insomnia Severity Index questionnaires, alongside bespoke questions about napping, training, and nutrition behaviors. RESULTS: Pittsburgh Sleep Quality Index (4.3 ± 2.4 to 5.8 ± 3.1) and Insomnia Severity Index (4.8 ± 4.7 to 7.2 ± 6.4) scores increased from pre- to during lockdown (p < 0.001). Pittsburgh Sleep Quality Index was predominantly influenced by sleep-onset latency (p < 0.001; + 29.8%), sleep efficiency (p < 0.001; - 21.1%), and total sleep time (p < 0.001; - 20.1%), whilst Insomnia Severity Index was affected by sleep-onset latency (p < 0.001; + 21.4%), bedtime (p < 0.001; + 9.4%), and eating after midnight (p < 0.001; + 9.1%). During lockdown, athletes reported fewer training sessions per week (- 29.1%; d = 0.99). Athletes went to bed (+ 75 min; 5.4%; d = 1.14) and woke up (+ 150 min; 34.5%; d = 1.71) later during lockdown with an increased total sleep time (+ 48 min; 10.6%; d = 0.83). Lockdown-mediated circadian disruption had more deleterious effects on the sleep quality of individual-sport athletes compared with team-sport athletes (p < 0.001; d = 0.41), elite compared with non-elite athletes (p = 0.028; d = 0.44) and older compared with younger (p = 0.008; d = 0.46) athletes. CONCLUSIONS: These lockdown-induced behavioral changes reduced sleep quality and increased insomnia in athletes. Data-driven and evidence-based recommendations to counter these include, but are not limited to: (i) early outdoor training; (ii) regular meal scheduling (whilst avoiding meals prior to

Published
2021

20. Training During the COVID-19 Lockdown: Knowledge, Beliefs, and Practices of 12,526 Athletes from 142 Countries and Six Continents.

Author

Washif, JA, Farooq, A, Krug, I, Pyne, DB, Verhagen, E, Taylor, L, Wong, DP, Mujika, I, Cortis, C, Haddad, M, Ahmadian, O, Al Jufaili, M, Al-Horani, RA, Al-Mohannadi, AS, Aloui, A, Ammar, A, Arifi, F, Aziz, AR, Batuev, M, Beaven, CM, Beneke, R, Bici, A, Bishnoi, P, Bogwasi, L, Bok, D, Boukhris, O, Boullosa, D, Bragazzi, N, Brito, J, Cartagena, RPP, Chaouachi, A, Cheung, SS, Chtourou, H, Cosma, G, Debevec, T, DeLang, MD, Dellal, A, Dönmez, G, Driss, T, Peña Duque, JD, Eirale, C, Elloumi, M, Foster, C, Franchini, E, Fusco, A, Galy, O, Gastin, PB, Gill, N, Girard, O, Gregov, C, Halson, S, Hammouda, O, Hanzlíková, I, Hassanmirzaei, B, Haugen, T, Hébert-Losier, K, Muñoz Helú, H, Herrera-Valenzuela, T, Hettinga, FJ, Holtzhausen, L, Hue, O, Dello Iacono, A, Ihalainen, JK, James, C, Janse van Rensburg, DC, Joseph, S, Kamoun, K, Khaled, M, Khalladi, K, Kim, KJ, Kok, L-Y, MacMillan, L, Mataruna-Dos-Santos, LJ, Matsunaga, R, Memishi, S, Millet, GP, Moussa-Chamari, I, Musa, DI, Nguyen, HMT, Nikolaidis, PT, Owen, A, Padulo, J, Pagaduan, JC, Perera, NP, Pérez-Gómez, J, Pillay, L, Popa, A, Pudasaini, A, Rabbani, A, Rahayu, T, Romdhani, M, Salamh, P, Sarkar, A-S, Schillinger, A, Seiler, S, Setyawati, H, Shrestha, N, Suraya, F, Tabben, M, Trabelsi, K, Urhausen, A, Valtonen, M, Weber, J, Whiteley, R, Zrane, A, Zerguini, Y, Zmijewski, P, Sandbakk, Ø, Ben Saad, H, Chamari, K, Washif, JA, Farooq, A, Krug, I, Pyne, DB, Verhagen, E, Taylor, L, Wong, DP, Mujika, I, Cortis, C, Haddad, M, Ahmadian, O, Al Jufaili, M, Al-Horani, RA, Al-Mohannadi, AS, Aloui, A, Ammar, A, Arifi, F, Aziz, AR, Batuev, M, Beaven, CM, Beneke, R, Bici, A, Bishnoi, P, Bogwasi, L, Bok, D, Boukhris, O, Boullosa, D, Bragazzi, N, Brito, J, Cartagena, RPP, Chaouachi, A, Cheung, SS, Chtourou, H, Cosma, G, Debevec, T, DeLang, MD, Dellal, A, Dönmez, G, Driss, T, Peña Duque, JD, Eirale, C, Elloumi, M, Foster, C, Franchini, E, Fusco, A, Galy, O, Gastin, PB, Gill, N, Girard, O, Gregov, C, Halson, S, Hammouda, O, Hanzlíková, I, Hassanmirzaei, B, Haugen, T, Hébert-Losier, K, Muñoz Helú, H, Herrera-Valenzuela, T, Hettinga, FJ, Holtzhausen, L, Hue, O, Dello Iacono, A, Ihalainen, JK, James, C, Janse van Rensburg, DC, Joseph, S, Kamoun, K, Khaled, M, Khalladi, K, Kim, KJ, Kok, L-Y, MacMillan, L, Mataruna-Dos-Santos, LJ, Matsunaga, R, Memishi, S, Millet, GP, Moussa-Chamari, I, Musa, DI, Nguyen, HMT, Nikolaidis, PT, Owen, A, Padulo, J, Pagaduan, JC, Perera, NP, Pérez-Gómez, J, Pillay, L, Popa, A, Pudasaini, A, Rabbani, A, Rahayu, T, Romdhani, M, Salamh, P, Sarkar, A-S, Schillinger, A, Seiler, S, Setyawati, H, Shrestha, N, Suraya, F, Tabben, M, Trabelsi, K, Urhausen, A, Valtonen, M, Weber, J, Whiteley, R, Zrane, A, Zerguini, Y, Zmijewski, P, Sandbakk, Ø, Ben Saad, H, and Chamari, K

Abstract

OBJECTIVE: Our objective was to explore the training-related knowledge, beliefs, and practices of athletes and the influence of lockdowns in response to the coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). METHODS: Athletes (n = 12,526, comprising 13% world class, 21% international, 36% national, 24% state, and 6% recreational) completed an online survey that was available from 17 May to 5 July 2020 and explored their training behaviors (training knowledge, beliefs/attitudes, and practices), including specific questions on their training intensity, frequency, and session duration before and during lockdown (March-June 2020). RESULTS: Overall, 85% of athletes wanted to "maintain training," and 79% disagreed with the statement that it is "okay to not train during lockdown," with a greater prevalence for both in higher-level athletes. In total, 60% of athletes considered "coaching by correspondence (remote coaching)" to be sufficient (highest amongst world-class athletes). During lockdown, < 40% were able to maintain sport-specific training (e.g., long endurance [39%], interval training [35%], weightlifting [33%], plyometric exercise [30%]) at pre-lockdown levels (higher among world-class, international, and national athletes), with most (83%) training for "general fitness and health maintenance" during lockdown. Athletes trained alone (80%) and focused on bodyweight (65%) and cardiovascular (59%) exercise/training during lockdown. Compared with before lockdown, most athletes reported reduced training frequency (from between five and seven sessions per week to four or fewer), shorter training sessions (from ≥ 60 to < 60 min), and lower sport-specific intensity (~ 38% reduction), irrespective of athlete classification. CONCLUSIONS: COVID-19-related lockdowns saw marked reductions in athletic training specificity, intensity, frequency, and duration, with notable within-sample differences (by athlete clas

Published
2021

21. Effects of home confinement on mental health and lifestyle behaviours during the COVID-19 outbreak: Insights from the ECLB-COVID19 multicentre study

Author

Ammar, A., Trabelsi, K., Brach, M., Chtourou, H., Boukhris, O., Masmoudi, L., Bouaziz, B., Bentlage, E., How, D., Ahmed, M., Mueller, P., Mueller, N., Hammouda, O., Paineiras-Domingos, L. L., Braakman-Jansen, A., Wrede, C., Bastoni, S., Pernambuco, C. S., Mataruna, L., Taheri, M., Irandoust, K., Khacharem, A., Bragazzi, N. L., Strahler, J., Adrian, J., Andreeva, A., Glenn, J. M., Bott, N. T., Gargouri, F., Chaari, L., Batatia, H., Khoshnami, S. C., Samara, E., Zisi, V., Sankar, P., Ahmed, W. N., Ali, G. M., Abdelkarim, O., Jarraya, M., Abed, K. E., Moalla, W., Romdhani, M., Aloui, A., Souissi, N., van Gemert-Pijnen, L., Riemann, B. L., Riemann, L., Delhey, J., Gomez-Raja, J., Epstein, M., Sanderman, R., Schulz, S., Jerg, A., Al-Horani, R., Mansi, T., Jmail, M., Barbosa, F., Ferreira-Santos, F., Simunic, B., Pisot, R., Pisot, S., Gaggioli, Andrea, Zmijewski, P., Bailey, S. J., Steinacker, J., Chamari, K., Driss, T., Hoekelmann, A., Gaggioli A. (ORCID:0000-0001-7818-7598), Ammar, A., Trabelsi, K., Brach, M., Chtourou, H., Boukhris, O., Masmoudi, L., Bouaziz, B., Bentlage, E., How, D., Ahmed, M., Mueller, P., Mueller, N., Hammouda, O., Paineiras-Domingos, L. L., Braakman-Jansen, A., Wrede, C., Bastoni, S., Pernambuco, C. S., Mataruna, L., Taheri, M., Irandoust, K., Khacharem, A., Bragazzi, N. L., Strahler, J., Adrian, J., Andreeva, A., Glenn, J. M., Bott, N. T., Gargouri, F., Chaari, L., Batatia, H., Khoshnami, S. C., Samara, E., Zisi, V., Sankar, P., Ahmed, W. N., Ali, G. M., Abdelkarim, O., Jarraya, M., Abed, K. E., Moalla, W., Romdhani, M., Aloui, A., Souissi, N., van Gemert-Pijnen, L., Riemann, B. L., Riemann, L., Delhey, J., Gomez-Raja, J., Epstein, M., Sanderman, R., Schulz, S., Jerg, A., Al-Horani, R., Mansi, T., Jmail, M., Barbosa, F., Ferreira-Santos, F., Simunic, B., Pisot, R., Pisot, S., Gaggioli, Andrea, Zmijewski, P., Bailey, S. J., Steinacker, J., Chamari, K., Driss, T., Hoekelmann, A., and Gaggioli A. (ORCID:0000-0001-7818-7598)

Abstract

Although recognised as effective measures to curb the spread of the COVID-19 outbreak, social distancing and self-isolation have been suggested to generate a burden throughout the population. To provide scientific data to help identify risk factors for the psychosocial strain during the COVID-19 outbreak, an international cross-disciplinary online survey was circulated in April 2020. This report outlines the mental, emotional and behavioural consequences of COVID-19 home confinement. The ECLB-COVID19 electronic survey was designed by a steering group of multidisciplinary scientists, following a structured review of the literature. The survey was uploaded and shared on the Google online survey platform and was promoted by thirty-five research organizations from Europe, North Africa, Western Asia and the Americas. Questions were presented in a differential format with questions related to responses “before” and “during” the confinement period. 1047 replies (54% women) from Western Asia (36%), North Africa (40%), Europe (21%) and other continents (3%) were analysed. The COVID-19 home confinement evoked a negative effect on mental wellbeing and emotional status (P < 0.001; 0.43 ≤ d ≤ 0.65) with a greater proportion of individuals experiencing psychosocial and emotional disorders (+10% to +16.5%). These psychosocial tolls were associated with unhealthy lifestyle behaviours with a greater proportion of individuals experiencing (i) physical (+15.2%) and social (+71.2%) inactivity, (ii) poor sleep quality (+12.8%), (iii) unhealthy diet behaviours (+10%), and (iv) unemployment (6%). Conversely, participants demonstrated a greater use (+15%) of technology during the confinement period. These findings elucidate the risk of psychosocial strain during the COVID-19 home confinement period and provide a clear remit for the urgent implementation of technology-based intervention to foster an Active and Healthy Confinement Lifestyle AHCL).

Published
2021

24. Hardware/Software co-design

Author

Jerraya, A., primary, Daveau, J.M., additional, Marchioro, G., additional, Valderrama, C., additional, Romdhani, M., additional, Ismail, T. Ben, additional, Zergainoh, N.E., additional, Hessel, F., additional, Coste, P., additional, Marrec, Ph. Le, additional, Baghdadi, A., additional, and Gauthier, L., additional

Full Text
View/download PDF

26. Hardware/Software co-design.

Author

Reis, Ricardo, Lubaszewski, Marcelo, Jess, Jochen A. G., Jerraya, A., Daveau, J. M., Marchioro, G., Valderrama, C., Romdhani, M., Ismail, T. Ben, Zergainoh, N. E., Hessel, F., Coste, P., Marrec, Ph. Le, Baghdadi, A., and Gauthier, L.

Abstract

Copyright of Design of Systems on a Chip: Design & Test is the property of Springer eBooks and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2006
Full Text
View/download PDF

37. Co-Specifications for Co-Design in Avionics Systems Development

Author

Romdhani, M., de Chazelles, P., Jeffroy, A., Sahraoui, A.E.K., and Jerraya, A.A.

Abstract

Hardware-software concurrent design, referred to as co-design, is a new methodology that integrates both the development of hardware and software. It is made up mainly by the steps of specification, partitioning, and prototyping. This paper issues the step of specification. We propose a specification paradigm based on the use of more than one single language. This approach is referred to as co-specifications. It deals with formalizing the requirements through several partial specifications. These are therefore composed in a unified model that is used for later co-design steps. We illustrate the approach through the specification of an avionics system that is part of the AIRBUS A340 on-board systems family.

Published
1995
Full Text
View/download PDF

38. Ethical dilemma for healthcare professionals facing elderly dementia patients during the COVID-19 pandemic

Author

Romdhani, M., Kohler, S., Koskas, P., and Drunat, O.

Abstract

The management of elderly patients with dementia and COVID-19 infections without access to an intensive care unit gives rise to serious ethical conflicts. Therapeutic decisions have been made in psychogeriatric units, leaving a heavy moral burden on staff. They had to deal with the most difficult patients without the support of appropriate guidelines. The gap between established rules and hospital reality led to psychological distress and burnout. Managing uncertainty in medical decisions is a skill that doctors and staff learn through experience. However, with the COVID-19 pandemic, uncertainty about patient outcomes seems no longer acceptable. Geriatric triage has challenged professional conscience, emotions and values. The principle of distributive justice, which consists of giving each person in society what is rightfully his or hers, is not being respected during this pandemic. Charity has been reduced to patient survival. Staffs need to make decisions together, and it is important to allow all carers access to a space for reflection. In our unit, the involvement of nurses and care assistants in the decision-making process for patient care is crucial especially for refusal of care. Their view of the patient's condition is different from that of the doctors, as they provide daily care to the patient and stay in the wards for several hours with them. By including as many people as possible in the reflection, we could avoid moral or personal prejudices related to these difficult decisions. The current pandemic can give new meaning to team thinking, giving everyone a voice without hierarchical barriers. With these new waves of COVID-19, we need to rethink our therapeutic conduct for elderly patients with dementia to avoid ethical failure.

Published
2021
Full Text
View/download PDF

44. N-Bromosuccinimide–thiol cobromination in basic medium: an efficient one-pot transformation of olefins into the corresponding enol thioethers

Author

Zoghlami, H., Chehidi, I., Romdhani, M., Chaabouni, M.M., and Baklouti, A.

Subjects
*STEREOCHEMISTRY, *CHEMICAL reactions, *BROMOSUCCINIMIDE, *ALKENES
Abstract

Abstract: A convenient method for the one-pot conversion of olefins into the corresponding enol thioethers is reported. The products were obtained via the N-bromosuccinimide cobromination reaction of olefins with thiols in basic medium. Steric hindrance present in the product alkenes may explain the stereochemistry observed. [Copyright &y& Elsevier]

Published
2007
Full Text
View/download PDF

45. Nocturnal Melatonin Ingestion Improves Soccer Players' Short-Term Maximal Performances on the Following Day.

Author

Ghattassi K, Farjallah MA, Graja A, Romdhani M, Boudhina N, Guimard A, Driss T, Souissi N, Chtourou H, and Hammouda O

Subjects
Humans, Young Adult, Male, Sleep Quality, Double-Blind Method, Blood Glucose metabolism, Physical Exertion physiology, Cross-Over Studies, Exercise Test, Cognition drug effects, Cognition physiology, Melatonin administration & dosage, Soccer physiology, Athletic Performance physiology, Hand Strength physiology, Reaction Time drug effects, Lactic Acid blood
Abstract

Purpose: Exogenous melatonin has been proven to have beneficial effects on sleep. A good sleep quality promotes recovery and improves physical performance. In this sense, the present study aimed to explore the potential effect of nocturnal melatonin ingestion on psycho-cognitive and short-term maximal performances, in the following morning. Method: Twelve professional soccer players (22.9 ± 1.3 years, 1.80 ± 0.05 m, and 72.0 ± 8.8 kg) volunteered to perform two separate testing sessions after either nocturnal melatonin or placebo ingestion. The next morning, participants performed the following psycho-cognitive and physical tests: Hooper's index, reaction time, vigilance, handgrip strength (HG), squat jump (SJ), modified agility T-test (MAT) and Wingate anaerobic test (WanT). Rating of perceived exertion (RPE) and blood lactate [La] were recorded, respectively, immediately and 3 min after the WanT. Blood glucose [GL] was measured before and 3 min after WanT. Results: Compared with placebo, melatonin improved subjective sleep quality, short-term maximal performances (HG and SJ), reaction-time, as well as peak and mean WanT powers and decreased fatigue index and RPE scores. However, [La] and [GL] were not affected by melatonin ingestion. Conclusion: Nocturnal melatonin intake before sleep has beneficial effects on cognitive and physical performances the following day.

Published
2024
Full Text
View/download PDF

46. The relationship between quality of life, sleep quality, mental health, and physical activity in an international sample of college students: a structural equation modeling approach.

Author

Moussa-Chamari I, Farooq A, Romdhani M, Washif JA, Bakare U, Helmy M, Al-Horani RA, Salamh P, Robin N, and Hue O

Subjects
Humans, Female, Male, Cross-Sectional Studies, Universities, Young Adult, Surveys and Questionnaires, Adult, Latent Class Analysis, Depression epidemiology, Depression psychology, Adolescent, Quality of Life, Students psychology, Students statistics & numerical data, Sleep Quality, Mental Health statistics & numerical data, Exercise psychology
Abstract

Objective: We assessed the direct and indirect relationships between sleep quality, mental health, and physical activity with quality of life (QOL) in college and university students., Methods: In a cross-sectional design, 3,380 college students (60% females; age = 22.7 ± 5.4) from four continents (Africa: 32%; America: 5%; Asia: 46%; and Europe: 15%; others: 2%) completed the Pittsburgh Sleep Quality Index (PSQI); Insomnia Severity Index (ISI); Epworth Sleepiness Scale (ESS); the Depression, Anxiety, and Stress Scale 21 (DASS); the International Physical Activity Questionnaire short-form (IPAQ); and the World Health Organization Quality of Life-BREF (WHOQOL-Brief)., Results: We showed that sleep quality, insomnia, and depression had direct negative effects on the physical domain of QOL (β = -0.22, -0.19, -0.31, respectively, p  < 0.001). There was a strong negative direct association between depression and the psychological domain of QOL (β = -0.60, z = -22.21, p  < 0.001). Both stress and PSQI had direct effects on social relationships QOL (β = 0.11; z = 4.09; and β = -0.13; z = -7.40, respectively, p < 0.001). However, depression had the strongest direct impact on social relationships QOL (β = -0.41, z = -15.79, p < 0.001)., Conclusion: The overall QOL of university students is associated with their sleep quality, mental health, and physical activity warranting further interventional studies aiming at improving students' quality of life., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Moussa-Chamari, Farooq, Romdhani, Washif, Bakare, Helmy, Al-Horani, Salamh, Robin and Hue.)

Published
2024
Full Text
View/download PDF

47. Editorial: The physiological relationship between sleep and exercise.

Author

Lastella M, Trabelsi K, and Romdhani M

Abstract

Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision.

Published
2024
Full Text
View/download PDF

48. Extraction of Protein and Bioactive Compounds from Mediterranean Red Algae ( Sphaerococcus coronopifolius and Gelidium spinosum ) Using Various Innovative Pretreatment Strategies.

Author

Dhaouafi J, Nedjar N, Jridi M, Romdhani M, and Balti R

Abstract

In this study, the release of proteins and other biomolecules into an aqueous media from two red macroalgae ( Sphaerococcus coronopifolius and Gelidium spinosum ) was studied using eight different cell disruption techniques. The contents of carbohydrates, pigments, and phenolic compounds coextracted with proteins were quantified. In addition, morphological changes at the cellular level in response to the different pretreatment methods were observed by an optical microscope. Finally, the antioxidant capacity of obtained protein extracts was evaluated using three in vitro tests. For both S. coronopifolius and G. spinosum , ultrasonication for 60 min proved to be the most effective technique for protein extraction, yielding values of 3.46 ± 0.06 mg/g DW and 9.73 ± 0.41 mg/g DW, respectively. Furthermore, the highest total contents of phenolic compounds, flavonoids, and carbohydrates were also recorded with the same method. However, the highest pigment contents were found with ultrasonication for 15 min. Interestingly, relatively high antioxidant activities like radical scavenging activity (31.57-65.16%), reducing power (0.51-1.70, OD at 700 nm), and ferrous iron-chelating activity (28.76-61.37%) were exerted by the different protein extracts whatever the pretreatment method applied. This antioxidant potency could be attributed to the presence of polyphenolic compounds, pigments, and/or other bioactive substances in these extracts. Among all the used techniques, ultrasonication pretreatment for 60 min appears to be the most efficient method in terms of destroying the macroalgae cell wall and extracting the molecules of interest, especially proteins. The protein fractions derived from the two red macroalgae under these conditions were precipitated with ammonium sulfate, lyophilized, and their molecular weight distribution was determined using SDS-PAGE. Our results showed that the major protein bands were observed between 25 kDa and 60 kDa for S. coronopifolius and ranged from 20 kDa to 150 kDa for G. spinosum . These findings indicated that ultrasonication for 60 min could be sufficient to disrupt the algae cells for obtaining protein-rich extracts with promising biological properties, especially antioxidant activity.

Published
2024
Full Text
View/download PDF

49. Supporting athletes during a challenging situation: recommendations from a global insight of COVID-19 home-based training experience.

Author

Washif JA, Hettinga FJ, Ammar A, van Rensburg DCJ, Materne O, Trabelsi K, Romdhani M, Farooq A, Pyne DB, and Chamari K

Abstract

Background: For athletes, overcoming obstacles in challenging situations like pandemic home training is crucial. Strategies and approaches in this context are not well-documented. Our study aims to investigate such a scenario from a performance standpoint, based on a major global crisis: the COVID-19 pandemic and lockdown., Methods: This cross-sectional study surveyed athletes without disabilities using online questionnaires (35 languages) from May to July 2020. Questions included aspects of alternative routines, training monitoring, recovery, sleep patterns, injury occurrence/prevention based on structured answers, and an open-ended question on lockdown training experiences., Results: Of the 11,762 athletes from 142 countries, 63% were male, including at World-Class, International, National, State and Recreational levels. During lockdown, 25% athletes used innovative or modern ways to maintain or improve fitness e.g., virtual reality and tracking devices (favoring World-Class level, 30%). Many athletes, regardless of gender (43%) watched video competitions to improve/maintain their mental skills and performance [World-Class (47%) and International (51%)]. Contact frequency between athletes and their coaches was mainly at least once a week (36%), more among higher-level (World-Class/International) than lower-level athletes (27 vs. 16%). Higher-level athletes (≥ 54%) monitored training load and were assisted by their coaches (21%). During lockdown, stretching (67%) was considered one of the primary means of recovery, especially for higher-level athletes (> 70%). Compared to pre-lockdown, about two-thirds of athletes reported "normal" or "improved" sleep quality and quantity, suggesting a low sleep quality pre-lockdown. On average, 40% utilized injury prevention exercises (at least) once a week [World-Class (51%) and International (39%)]. Most injury occurrences during lockdown involved the knee (18%), ankle (16%), and back (9%). Four key themes emerged regarding lockdown experiences: remote training adaptation (e.g., shifting training focus), training creativity (e.g., using household items), performance enhancement opportunities (e.g., refocusing neglected aspects), and mental and motivation challenges., Conclusions: Both male and female athletes, particularly those of higher levels, displayed some adaptalibity during the COVID-19 lockdown, employing innovative approaches and technology for training. Many athletes implemented load monitoring, recovery, and attentive of injury prevention, while optimizing their sleep quality and quantity. Athletes demonstrated their abilities to navigate challenges, and utilized different coping strategies in response to the lockdown's constraints., (© 2024. The Author(s).)

Published
2024
Full Text
View/download PDF

50. Using artificial intelligence for exercise prescription in personalised health promotion: A critical evaluation of OpenAI's GPT-4 model.

Author

Dergaa I, Saad HB, El Omri A, Glenn JM, Clark CCT, Washif JA, Guelmami N, Hammouda O, Al-Horani RA, Reynoso-Sánchez LF, Romdhani M, Paineiras-Domingos LL, Vancini RL, Taheri M, Mataruna-Dos-Santos LJ, Trabelsi K, Chtourou H, Zghibi M, Eken Ö, Swed S, Aissa MB, Shawki HH, El-Seedi HR, Mujika I, Seiler S, Zmijewski P, Pyne DB, Knechtle B, Asif IM, Drezner JA, Sandbakk Ø, and Chamari K

Abstract

The rise of artificial intelligence (AI) applications in healthcare provides new possibilities for personalized health management. AI-based fitness applications are becoming more common, facilitating the opportunity for individualised exercise prescription. However, the use of AI carries the risk of inadequate expert supervision, and the efficacy and validity of such applications have not been thoroughly investigated, particularly in the context of diverse health conditions. The aim of the study was to critically assess the efficacy of exercise prescriptions generated by OpenAI's Generative Pre-Trained Transformer 4 (GPT-4) model for five example patient profiles with diverse health conditions and fitness goals. Our focus was to assess the model's ability to generate exercise prescriptions based on a singular, initial interaction, akin to a typical user experience. The evaluation was conducted by leading experts in the field of exercise prescription. Five distinct scenarios were formulated, each representing a hypothetical individual with a specific health condition and fitness objective. Upon receiving details of each individual, the GPT-4 model was tasked with generating a 30-day exercise program. These AI-derived exercise programs were subsequently subjected to a thorough evaluation by experts in exercise prescription. The evaluation encompassed adherence to established principles of frequency, intensity, time, and exercise type; integration of perceived exertion levels; consideration for medication intake and the respective medical condition; and the extent of program individualization tailored to each hypothetical profile. The AI model could create general safety-conscious exercise programs for various scenarios. However, the AI-generated exercise prescriptions lacked precision in addressing individual health conditions and goals, often prioritizing excessive safety over the effectiveness of training. The AI-based approach aimed to ensure patient improvement through gradual increases in training load and intensity, but the model's potential to fine-tune its recommendations through ongoing interaction was not fully satisfying. AI technologies, in their current state, can serve as supplemental tools in exercise prescription, particularly in enhancing accessibility for individuals unable to access, often costly, professional advice. However, AI technologies are not yet recommended as a substitute for personalized, progressive, and health condition-specific prescriptions provided by healthcare and fitness professionals. Further research is needed to explore more interactive use of AI models and integration of real-time physiological feedback., Competing Interests: The authors declare no conflict of interest. The authors wish to affirm that this research was executed with complete academic integrity, free of any commercial or financial biases. Specifically, while we employed the paid version of ChatGPT 4.0 for its advanced capabilities in exercise prescription, this was not done with any intention to promote or encourage its use. Our choice of this platform was strictly to assess its potential in the realm of exercise prescription, without any sponsorship or incentives from the developers or associated entities of ChatGPT. No author has affiliations with OpenAI or any other commercial entities related to the content of the manuscript. Our sole commitment remains to transparent, unbiased evaluations that serve to advance the intersection of sports medicine and artificial intelligence., (Copyright © Biology of Sport 2024.)

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results