Search

This study aimed at assessing the impact of video modeling examples (VMEs) on secondary school students’ self-regulated learning experiences in gymnastics in original physical education (PE) settings. A total of 56 students (28 males and 28 females), aged 16–17, took part in a seven-week gymnastics learning unit for the purpose of acquiring new motor skills and knowledge using VMEs, in the absence of teacher and peer assistance. Repeated measurements were collected through gymnastics floor routines and a custom-designed written test. Semi-structured interviews were administered to explore students’ self-regulated learning strategies. The analysis of quantitative data revealed significant improvements in males’ skill performance (pre: 4.54 ± 2.42, post: 10.97 ± 3.25 points; p

Despite the worldwide increase in the use of Information and Communication Technologies (ICTs) in Physical Education (PE) over the past two decades, little is yet known about how these technologica...

This study reports on sports science students' educational experience in times of the COVID-19 pandemic and explores their interactions with online technologies, exclusively for learning purposes.A total of 181 Tunisian final-year sports science students were surveyed using, a custom-designed questionnaire, following the end of the academic year 2020/2021. Semi-structured interviews were conducted for triangulation and validation of the findings.Participants reported that COVID-19-induced educational disruptions had detrimental effects on their learning experiences. Even though they deemed emergency remote teaching to be less effective than classroom-based teaching, participants recognized the role technology had played in mitigating the impact of the pandemic on their graduation year. They reported using a wide range of online technologies to complement remote curriculum delivery. Ranking second after Google Meet, with a marked difference from the rest of the list, YouTube seemed to be sports science students' best "learning companion" in times of COVID-19. YouTube helped them better understand instructional content delivered remotely and compensate for the missed opportunities for knowledge and motor skill acquisition.It is very likely that curriculum-based YouTube videos can smoothen emergency implementation of flipped classrooms during future crises that may force teachers and students into home confinement once again, but further empirical research is needed in this area.

Background: There is a lack of descriptive data available regarding the characteristics of female soccer players from the African continent or the Arab world. Objective: This study investigated the anthropometric and physical fitness profiles of Tunisian female soccer players in relation to field position. Methods: In all, 75 Tunisian sub-elite female soccer players, with an average of 4.3 ± 1.6 years of playing experience, including goalkeepers (GK; n = 11), central defenders (CD; n = 13), external defenders (ED; n = 15), central midfielders (CM; n = 10), external midfielders (EM; n = 14), and attackers (AT; n = 12), underwent anthropometric evaluations (body height, body mass, and body fat percentage) and physical fitness tests (flexibility, countermovement jump [CMJ], 20-m sprint, and Yo-Yo intermittent recovery test level 1 [YoYoIR1]). Results: GK had significantly higher body mass (67.3 ± 2.4 kg), body height (169.3 ± 1.7 m) and fat percentage (24 ± 2.6%) compared to all field positions. AT were significantly faster (3.64 ± 0.10 s) than GK (3.75 ± 0.09 s) in the 20-m sprint (p < .01), but there were no significant differences among the other field positions. GK had a significantly lower Yo-YoIR1 performance (625 ± 84 m) than other field position players (p < .001), but no significant difference was found among other field positions. GK and AT showed significantly better CMJ performance (GK: 31.3 ± 2.6 cm, AT: 30.4 ± 2.4 cm) compared to other groups. GK had higher flexibility (21.6 ± 2.7 cm in the the sit-and-reach test) than all other positions (p < .05), but no significant difference was observed among players in the field. Conclusions: Overall, we can conclude that, in a north African sample of female soccer players, anthropometric profiles vary by playing position. As well, positional differences can be found when testing physical fitness components. This information could help coaches design more effective training programs to achieve success in modern soccer.

Background: Although studies on adolescent girls' disengagement in Physical Education (PE) abound in the literature, most of all investigated root causes only, while few took the initiative to address the inherent issue. Objective: This study primarily aimed at investigating the impact of peer-to-peer feedback interactions on female adolescents' engagement in PE classes, in addition to assessing the potential of video technology in the enhancement of this experience. Methods: A total of 47 Tunisian female students, aged 17 to 18 years, took part in a six-week experiment, during which they went through different long jump learning conditions. A comparative methodology was implemented, involving two experimental conditions including a vision-based feedback group (VsFG; n = 15) and a video-based feedback group (VdFG; n = 12), as well as a control group (CG; n = 20). Data was collected using motor performance tests, a custom-designed theoretical knowledge test, feedback provision rates, motivation and feeling scales, questionnaires, and interviews. Results: Data analysis revealed that the video-based peer feedback approach was more efficient in terms of its ability in enhancing the studied population's engagement in the learning process during PE classes. Indeed, the positive effects of vision-based peer feedback interactions were observed only on female students' emotional engagement (CG < VsFG, p < .001), whereas the video-based peer feedback interactions were potent enough to enhance female students' motor (CG < VdFG, p = .019), cognitive (CG < VdFG, p = .002), emotional (CG < VdFG, p < .001) and socio-interactional (VsFG < VdFG, p < .001) engagement in PE classes. Conclusions: The findings of this study concluded that peer-to-peer feedback interactions during PE classes were inefficient without the mediation role of the video technology.

In soccer, accurate kicking skills are important determinants of successful performance. A successful kick must meet several criteria, including speed, accuracy, and timing. In fact, players who are able to kick the ball more accurately under various difficulties, such as time pressure, space constraints, the opponent’s pressure, and the distance between the kicking point and the goal, have a clear advantage during soccer games. The aim of the present study was to investigate the effect of exercise difficulty and time-of-day on perceived task difficulty and kicking performance. Accordingly, 32 boys (age: 11 ± 0.7 years, height: 1.45 ± 0.07 m, body-mass: 38.9 ± 7.8 kg) performed shooting accuracy tests under two difficulty levels (distance (long-distance (LD) vs. short-distance (SD)) and time pressure (Without-time-pressure (WTP) vs. With-time-pressure (TP)) at 08:00 h and 17:00 h. Absolute-error, variable-error, and constant-error were evaluated during the kicking tasks, in addition to ball velocity and shooting quality. Moreover, rating-of-perceived-exertion score (RPE), feeling-scale (FS), and perceived difficulty were completed immediately at the end of each test. The results showed that shooting quality was not affected by the time-of-day, but it was better in WTP vs. TP (p &lt, 0.05), and in SD vs. LD (p &lt, 0.05), respectively. Higher values for FS and lower values for RPE were observed in the morning compared to the afternoon (p &lt, 0.05) and in WTP vs. TP (p &lt, 0.05). In conclusion, specific soccer skills of boys were not time-of-day dependent, but they may be associated with time pressure and task difficulty.

The lack of training caused by the COVID-19 pandemic could have significant consequences on the performance and health of athletes. The aim of the present study was to test the effects of two innovative distance education methods on improving motor skills in weightlifting. We randomized 35 children (aged 10 to 12) into groups of peer-to-peer online video feedback with a pedagogical activity (P-VF-PA), peer-to-peer online video feedback only (P-VF), and control group (CONT). Learners underwent a test one week before (T0) and one day after (T1) an eight-session training intervention and a retention test session a week later (T2). Kinovea was used to measure the kinematic parameters of the snatch performance. After the distance learning sessions, the training with the P-VF-PA method improved most of the kinematic parameters compared to the P-VF method, and the advantages derived from its application persisted in the retention test (e.g., the difference between the right side and left side distances of the bar trajectory Diff-Tr (T1 vs. T0: 42.32 ± 41.33%, Hedges’ g = 1.16, p

The aim of the study was to compare the effect of stretching procedures on global coordination and accuracy in instep soccer kicks achieved in different stress conditions. Twenty male young soccer players completed the global coordination test (GC), the instep kicking accuracy test in free (FKA) and in time-pressure (TPKA) conditions, either after static (SS), dynamic (DS), ballistic (BS) or no-stretching (CTR) protocols, on nonconsecutive days and in a randomized order. After performing a 5min standardized intensity jogging (70% of MAV), followed by stretching exercises for 10min, each participant completed, successively, the GC, FKA and TPKA tests. Accuracy data, heart-rate, rating of perceived exertion and task difficulty perception were recorded and analyzed using a two-way ANOVA. GC scores were analyzed using one way ANOVA with repeated measures. The results showed higher GC and TPKA performances after DS and BS procedures. However, there was no effect of the stretching procedures on FKA. The GC scores increased by 10.8% and 7.2% after DS and BS, respectively, but were not affected by SS. Compared to FKA, the TPKA accuracy significantly decreased by 20.2% after CTR (p0.01) and 30.7% SS (p0.001) with no significant difference after DS (10.1%; p0.05) and BS (11.0%; p0.05). The use of dynamic and ballistic stretching yielded to better GC scores and helped reducing the adverse effect of time-pressure on instep kicking accuracy. Consequently, dynamic and ballistic exercises can be recommended before practicing activities requiring coordination and lower limbs speed and accuracy.

The aim of this study was to examine the effect of time of day on soccer-specific skills and physiological and psychological parameters in children. Ten male children soccer players (age: 14.6 ± 0.8 years; height: 1.63 ± 0.4 m; body mass: 52.5 ± 4.9 kg) performed two shooting accuracy tests before and after a 10 × 20-m dribbling sprint test with 20-s of passive recovery between repetitions. The measurements were taken at 08:00 h, 13:00 h, and 17:00 h in a randomized order. Mean heart rate (HR) was monitored during the dribbling test. At the beginning of each test session, blood pressure and intra-aural temperature were measured. Likewise, children were asked to complete the profile of mood state (POMS) and the Hooper Index questionnaires. Lactate concentration ([La]) was recorded at rest, post-fifth recovery periods and post-second accuracy test. Moreover, they indicate their rating of perceived exertion (RPE) score immediately at the end of each test session. The results of this study showed that dribbli...

The purpose of this study was to investigate the diurnal variation in some specific skills performance during field testing in boy’s footballer. In a balanced and randomized study design, 15 boys (mean ± SD; age 12.7 ± 1.1 years; height 1.54 ± 9.1 m; body mass 45.1 ± 3.2 kg) participated in the study. Subjects performed some specific soccer skills (kicking accuracy, ball control with the body, ball control with the head, coordination test, zigzag running (i.e., agility), zigzag with the Ball (i.e., dribbling) and the skill index (i.e., the ratio of the zigzag running without and with the ball) at two different times of day: 07:00 and 17:00 h. Moreover, intra-aural temperature was measured at both time-of-days. Intra-aural temperature was higher in the evening than the morning (P < 0.01). Likewise, a significant time-of-day effect was found for dribbling (P < 0.05) and agility (P < 0.001) with higher performances observed at 17:00 h. However, no significant differences were noticed between 07:00 and 17:00 h for the skill index, kicking accuracy, ball control with the body, ball control with the head and coordination tests. The intra-aural temperature was found to be significantly correlated with the speed of dribbling and agility (P < 0.001). In conclusion, a diurnal variation in intra-aural temperature, agility and dribbling were shown to be present. No time-of-day effect was observed for the coordination, skill index, kicking accuracy and juggling performance.

The ability to perform repeated sprints is likely influenced by the mode of the recovery. Despite performance time, peak power, and mean power measured in most of studies, there are other specific sport abilities that should be examined after different recovery strategies.The aim of this study was to examine the effects of recovery modes (active [AR] vs. passive [PR]) on physiological performance (lactate, HR, and blood pressure), psychological performance (perceived exertion rating [RPE] and feeling scale [FS]), and specific skills (kicking accuracy [KA] and repeated dribbling) in young soccer players.Ten male children (age 14.6±0.8 yr; experience 5.3±0.4 yr; body height 1.63±0.4 m; body mass 52.5±4.9 kg) who were soccer players performed two kicking accuracy tests on two separate occasions that involved ten 20-m dribbling speed tests with 20 s of PR or AR in a random order. The dribbling speed performance, total dribbling time (TT), best dribbling time (BT), mean time (MT), RPE, FS, blood pressure (BP), HR, lactate concentration ([La]), and KA were recorded. In addition, the Fatigue Index (FI) was calculated from the Repeated Dribbling Sprint Test (RDST).The results showed that performing the RDST with PR between exercise bouts resulted in a shorter dribbling sprint time, as compared with AR during the last six repetitions. TT, MT, and FI (P0.001) were higher in AR than PR. However, BT, kicking accuracy, and the physiological parameters (i.e., [La], systolic blood pressure, and diastolic blood pressure) were not affected by the recovery type. Conversely, the present study demonstrated a better feeling score and lower perception of effort during passive recovery than during the active mode.The results of the present study demonstrate that PR is better than AR for RDST performance and for subjective fatigue estimation. Therefore, coaches and athletes are advised to utilize PR during competitions and training sessions requiring repeated high intensity exercises.

Resume L’objectif de cette etude est de comparer l’effet de l’entrainement continu (EC), intermittent (EI) et mixte (EM) sur les parametres lactiques et la vitesse maximale aerobie (VMA). Methodes Trente-six sujets, repartis en trois groupes, ont ete soumis a trois programmes d’entrainement differents : EC, EI et EM pendant six semaines a raison de six seances hebdomadaires. Tous les sujets ont realise avant et apres l’entrainement, les tests suivants : un premier test afin de determiner la VMA et le second test consiste a courir pendant 30 secondes a une intensite supramaximal suivi d’une recuperation active. A partir des mesures de la lactatemie collectees pendant la recuperation, chaque courbe individuelle de lactatemie a ete modelisee par l’equation biexponenetielle. Resultats L’entrainement met en evidence une augmentation significative de la VMA (p Conclusion Les methodes EM et EI sont les plus efficaces dans l’amelioration de la VMA. Neanmoins, ces deux methodes relevent un effet similaire sur tous les parametres etudies a l’exception de γ2. EI permet une γ2 la plus elevee.

Resume Objectif Evaluer l’effet d’un exercice de type anaerobie sur le statut antioxydant enzymatique chez des judokas et chez des sedentaires. Materiels et methodes Dix judokas de sexe masculin (âge : 18,1 ± 1,6 ans ; poids : 77,2 ± 11,6 kg ; taille : 176,4 ± 4,6 cm) et dix sedentaires (âge : 19,5 ± 1,7 ans ; poids : 71,8 ± 2,5 kg ; taille : 175,9 ± 1,7 cm) ont effectue le test de Wingate. Des prelevements sanguins ont ete realises grâce a un catheter intraveineux, au repos (Repos), immediatement a l’arret du test de Wingate (P0), puis a cinq (P5), dix (P10) et 20 (P20) minutes de recuperation. Les parametres mesures sont : la superoxyde dismutase (SOD), le glutathion peroxydase (GPx) et le statut antioxydant total (SAT). Resultats La concentration de la SOD chez les judokas augmente significativement ( p p P Conclusion Les judokas presentent des capacites antioxydantes meilleures que les sedentaires.

This paper describes a computer model of human thermoregulation based on the Fiala model that we have extended with a module for active body climate control. The main stimulus for the development of this model is the need to predict the thermal response of the human body to the actual prototype for active body climate control. This prototype supports the heat exchange mechanisms of the body by improving convection and especially evaporation. The model has been validated with experimental data from a field study. As a result, new design recommendations for the enhancement of the prototype and especially the control algorithm, based on vital and environmental parameters, could be identified.

In this work, we describe a set of integrated and ambient sensors, that can be used for the identification and evaluation of suitable sensors for the assessment of psychophysiologic driver state. Applications using this information cover a wide spectrum from driver vigilance monitoring to in-car health management. However, application specific, unobtrusive integration of sensors is necessary to keep the driver's distraction at a minimum. Therefore, contact and non-contact based physiological sensors and their integration into the car environment are presented here. Textile capacitive ECG electrodes have been developed and the integration of various physiological sensors into a Mercedes S-Class steering wheel is described. Furthermore, a custom embedded system has been designed to perform data acquisition and online processing of the biosignals and to provide an interface for car information systems.

Stress is one of the most common reasons for a number of serious diseases. For the prevention and treatment of stress, a psycho-physiological monitoring system for stress measurement is needed. Because of the multifarious influences of stress on the physiological response of the body, a stress measurement system has to take into account as many parameters as possible. The pulse transit time (PTT), which is determined by measuring the ECG and the pulse wave at for example a finger, gives comprehensive information about the cardiovascular system. In a study we investigate the correlation between the PTT and the stress induced by a psychological experiment. We found out that there is a strong correlation and that PTT is an appropriate parameter for stress measurement.

In order to investigate the correlation between stress and cognitive performance, a mobile Body & Mind Monitoring System was implemented. This system has a modular design and contains different modules allowing a long time and noninvasive monitoring of physiological parameters of a test person in his every day life, for instance ECG, GSR, PPG, respiration and physical activity. The functionality of the created set-up was validated and clinical studies can now be conducted.