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Volleyball is a popular Olympic sport but has been little studied. Volleyball players have very distinct roles based on their playing positions. The present study aimed to investigate and compare cardiac functions and structure in elite volleyball players across different playing positions.Left ventricular structure and function were measured using echocardiography in 60 male professional volleyball players (30.6±3.6 years) across five playing positions including libero, opposite players, outside hitters, middle blockers, and setters.Significant differences in most echocardiographic variables were observed among different playing positions, including left ventricular (LV) internal dimension, posterior wall thickness, intact ventricular septum, stroke volume, cardiac output, end-diastolic volume, ejection fraction, and fractional shortening (all p0.01). End-systolic volume was not different among positions (p=0.167). The opposite players demonstrated greater LV dimension and thickness as well as systolic function than players in other positions (p0.05). Stroke volume in the setters was significantly lower than those of the opposite players and outside hitters (p0.05). Regression analysis showed that the playing position independently predicted most of the echocardiographic variables (p0.05).LV adaptations in volleyball players vary widely according to their playing positions. The opposite players had the most pronounced LV adaptations compared with player in other positions.

This study compared the effects of lower- versus higher-intensity isometric handgrip exercise on resting blood pressure (BP) and associated clinical markers in adults with hypertension. Thirty-nine males were randomly assigned to one of three groups, including isometric handgrip at 60% maximal voluntary contraction (IHG-60), isometric handgrip at 30% IHG-30, or a control group (CON) that had been instructed to continue with their current activities of daily living. The volume was equated between the exercise groups, with IHG-60 performing 8 × 30-s contractions and IHG-30 performing 4 × 2-min contractions. Training was performed three times per week for 8 weeks. Resting BP (median [IQR]), flow-mediated dilation, heart rate variability, and serum markers of inflammation and oxidative stress were measured pre- and post-intervention. Systolic BP was significantly reduced for IHG-60 (−15.5 mmHg [−18.75, −7.25]) and IHG-30 (−5.0 mmHg [−7.5, −3.5]) compared to CON (p < 0.01), but no differences were observed between both the exercise groups. A greater reduction in diastolic BP was observed for IHG-60 (−5.0 mmHg [−6.0, −4.25] compared to IHG-30 (−2.0 mmHg [−2.5, −2.0], p = 0.042), and for both exercise groups compared to CON (p < 0.05). Flow-mediated dilation increased for both exercise groups versus CON (p < 0.001). IHG-30 had greater reductions in interleukin-6 and tumor necrosis factor-α compared to the other groups (p < 0.05) and CON (p = 0.018), respectively. There was a reduction in Endothelin-1 for IHG-60 compared to CON (p = 0.018). Both the lower- and higher-intensity IHG training appear to be associated with reductions in resting BP and improvements in clinical markers of inflammation and oxidative stress.

Background and objective: Resistance training is a potential stimulus to increase muscle protein synthesis and the time under tension of muscle is one of the variables of strength training that contributes to its adaptation. The aim of this study was to investigate the effect of resistance training with slow and fast speeds on some anabolic and catabolic hormones in healthy young women. Methods: This quasi- experimental study was conducted on 20 female students (mean age 21.65±2.03 years). The subjects were randomly and equally assigned to two groups with a time under tension of 1s-1s (fast contraction speed (FCS)) and 3s-3s (slow contraction speed (SCS)). The training load was the same in both groups and resistance training was done in a circular manner for six weeks, three days a week in eight stations. Blood samples were taken from the subjects to study the research variables before the training period and 48h after the last session of the training. Results: There was no significant difference between the serum levels of GH(P = 0.82), IGF-1(P = 0.13) and cortisol(P = 0.59) in both groups, but the levels of myostatin in the fast group increased and in the slow group decreased, and the difference between the two groups was significant (P = 0.04). Also, in the strength test, the slow group experienced further increased strength. (P = 0.02) Conclusion: : Although no significant changes in the levels of IGF-1, myostatin, and cortisol is observed in intragroup comparison at six weeks, resistance training with slow contraction speed can lead to further increases in the growth hormone levels and strength.

Introduction Diabetes is the most common glandular disease in the world. The purpose of this study was to investigate the effect of six weeks of increasing endurance training with L-carnitine supplementation on Bax / Bcl-2 and oxidative stress indices in the cardiac tissue of diabetic rats. Materials and Methods In this experimental study, 45 male Wistar rats (weighing 20 ± 250 gr) were randomly divided into 6 groups: healthy control, diabetic control, sham, exercise, L carnitine, and exercise and L-carnitine. Rats were diabetic with injected 95 mg nicotinamide by intraperitoneal injection and after 15 minutes of injection, 55 mg STZ per body weight. Rats receiving El Carnitine received daily 100 mg of l-carnitine orally. The aerobic exercise program was started 5 days a week, for six days, with a gradient of zero degree, speed of 10 m and time of 10 minutes in the first week and the final week of gradient it reached 5 degree, speed of 20 m and time of 40 minutes. The variables were measured by ELISA and ASA kits and in the heart tissue. One-way ANOVA and Tukeychr('39')s post hoc test were used to analyze the data using the Shapiro Wylak test. Results The results showed that increasing endurance training and L-carnitine consumption had a significant effect on GPX (P = 0.001), MDA (P = 0.001), and Bax / Bcl2 heart rate (P = 0.001) in diabetic rats. Conclusion It seem The research results confirm the role of aerobic exercise and L-carnitine in improving apoptosis and oxidative stress in type 2 diabetic rats.

Objective: This study aimed to investigate the effects of moderate to high-intensity aerobic exercise on HbA1c (Glycated hemoglobin), FBS (fasting blood sugar) and cognitive function in mild cognitive impairment prediabetes patients. Materials and Methods: Seventeen elderly mild cognitive impairment (age 55-70) men and women were selected and were randomly divided into 2 groups as aerobic (n=10) and control (n=10). Six subjects were excluded during the study. Finally, 14 subjects were continued the exercise program. Assessments were done at baseline and 12 weeks after intervention. The 12-weeks aerobic exercise program consisted of 90 min sessions in length 3 days per week under the supervision of the exercise specialist. Cognitive function, HbA1c, and FBS were evaluated. The differences in all variables (one way ANOVA), correlation (Pearson single correlation) and relative changes between baseline and 12 weeks (paired T-tests) were investigated. Results: HbA1c, FBS decreased significantly in the aerobic group whereas cognitive function increased significantly after 12 weeks aerobic ( P -value< 0.05 for all). Also, the change of cognitive function was significantly associated with a change of FBS (r= -0.84) after a 12-week aerobic exercise ( P -value: 0.011). Differences between groups in HbA1c, FBS and cognitive function (Mini-Mental State Examination) were not significant. Conclusion: Aerobic exercise may improve HbA1c, FBS and subsequently cognitive function in prediabetes elderly subjects. Therefore, a decrease in glycemic indicators could lead to improve cognitive function.

Objective: The use of non-enzymatic antioxidants in the form of dietary supplements has a positive effect on reducing oxidative stress, and preventing apoptosis as they interrupt free radicals. The aim of this study was to investigate the aerobic exercise and L-carnitine consumption impacts on diabetes induced apoptosis, oxidative stress factors, and mitochondrial enzymes in rats. Materials and Methods: In this Clinical trial study, 45 male Wistar rats (200-300 g) were divided into six groups including sham, healthy control, diabetic control, diabetic & L-carnitine, diabetic & aerobic exercise, diabetic receiving L-carnitine & aerobic exercise . The rats attained a diabetic state with a single dose of STZ intraperitoneal injection (55 mg/kg body weight) and receiving L-carnitine 100 mg per day. The aerobic exercise protocol including five sessions per week was administered. The heart tissues of the dependent variables were measured by ELISA 24 hours after the last session of the exercise program. One-way ANOVA and Tukey's post hoc test at P-value< 0.05 were used to analyze the data. Results: result show that aerobic exercise and L-carnitine consumption have a significant effect on BAX (P-value= 0.001), Bcl-2 (P-value= 0.001), and SOD (P-value= 0.001) in diabetic rats. Conclusion: The results of the present study confirm the role of aerobic exercise and L-carnitine in improving the indices of apoptosis and oxidative stress in type 2 diabetic rats

Introduction: The central-governor model explains the mechanism of endurance exercise-induced central fatigue, but high-intensity exercise-induced central fatigue has not been investigated yet. This study aimed to research how central fatigue during high-intensity intermittent pedaling alters the neural response, which results in electroencephalography (EEG) recordings. Methods: We assessed neural response by measuring the alternation of brainwave spectral power during an intermittent high-intensity 60-minute exercise on an ergometer cycle. The cadences were changed every 10 minutes according to intermittent pattern altering (90-120-60-120-60-90 rpm). EEG was used to analyze altering brain function. Heart rate (HR), blood lactate (BL), and rating of perceived exertion (RPE) were measured after the change in cadences. Results: HR, BL, and RPE increased at a cadence of 120 rpm compared with 60 rpm on the ergometer cycle. The spectral power of EEG, according to cadence × brainwaves, significantly increased (P˂0.01) in the alpha and beta frequency ranges with a change in cadences between 60 rpm and 120 rpm. The spectral power of the EEG significantly increased (P˂0.01) over the whole frequency range from rest to warming (theta: 251%, alpha: 165%, beta: 145%) and significantly reduced in theta, alpha, and beta (theta: 176%, alpha: 142%, beta: 77%) (P≤0.01). Conclusion: High-intensity exercises (90 and 120 cadences) increased brain function, regardless of fatigue occurrence. High-intensity interval training (HIIT) led to altering the neural response. It would be required to investigate the usefulness of HIIT to treat some of the psychotic disorders.

Objective: The study aimed to determine the effect of eight weeks high intensity interval (HIIT) and sub-maximal continuous trainings on plasma betatrophin level in diabetic rats treated with metformin. Materials and Methods: In this experimental study, 42 diabeticwistar rats were divided into six groups (n=7): diabetic control (C), diabetic control + metformin consumption(C+M), diabetic HIIT, diabetic HIIT + metformin (HIIT+M), diabetic sub-maximal continuous training (SMCT), and diabetic sub-maximal continuous training + metformin (SMCT+M). Metformin was given 150 mg/kg/day by gavage every day, 48 hours after the end of the last training session, the rats were sacrificed. Then blood glucose and glycated hemoglobin (HbA1c) levels were measured. One-way ANOVA test was used for statistical analysis of data. Results: The level of plasma betatrophin was significantly different in the HIIT ( P -value= 0.01) and C+M ( P -value= 0.001) groups compared to C group. Blood glucose was significantly decreased in all training groups with or without betatrophin compared with the diabetic control group ( P -value= 0.001). However, there were no significant changes between glucose levels in HIIT, HIIT+M, SMCT, and SMCT+M groups but SMCT showed most reduction in blood glucose. Conclusion: Treatment with metformin did not change blood glucose but two types of exercise training with high and moderate intensity reduced blood glucose thus exercise can be a good alternative modality rather than taking medicine.

Background: It has been assumed that during and after BFR exercises, many blood factors are activated and angiogenesis response is stimulated in the arteries. Objectives: Therefore, the current study aimed to determine the effect of two eccentric resistance training methods with and without blood flow restriction on serum IL6 and MMP9 levels in active young men. Methods: In this quasi-experimental study, 16 healthy men with a mean age of 27.8 ± 2.85 (years), the weight of 79.4 ± 12.4 (kg), and a body mass index of 25.5 ± 3.7 (kg/m2) were randomly assigned to either low-intensity eccentric group with BFR or the high-intensity eccentric without BFR. The high-intensity (70% - 80% maximum voluntary contraction MVC) eccentric exercise without BFR included 3 - 5 cycles of eccentric contraction of the quadriceps muscles, up to exhaustion, whereas low-intensity eccentric exercise executed similar exercise modality at intensity of 20% - 30% MVC with blood flow restriction up to exhaustion. Blood samples were taken from antecubital both before and after the exercise to measure serum IL6 and MMP9 values using the ELISA method. Data were analyzed using paired t-test and analysis of variance with repeated measure test in SPSS version 22. A P value of < 0.05 was defined as statistically significant. Results: High-intensity resistance per se and low-intensity resistance exercise with BFR similarly resulted in a non-significant reduction of IL-6 and elevated levels of MMP-9 serum levels in active young men. Conclusions: Overall, the results indicated that a low-intensity resistance exercise session with restricted blood flow and a high-intensity resistance exercise without blood flow restriction equally did not affect IL6 and MMP9 serum of active young men. Further studies are needed to clarify the exact exercise modality that sufficiently stimulates angiogenesis.

Objective: The use of non-enzymatic antioxidants in the form of dietary supplements has a positive effect on reducing oxidative stress, and preventing apoptosis as they interrupt free radicals. The aim of this study was to investigate the aerobic exercise and Lcarnitine consumption impacts on diabetes induced apoptosis, oxidative stress factors, and mitochondrial enzymes in rats. Materials and Methods: In this Clinical trial study, 45 male Wistar rats (200-300 g) were divided into six groups including sham, healthy control, diabetic control, diabetic & L-carnitine, diabetic & aerobic exercise, diabetic receiving L-carnitine & aerobic exercise . The rats attained a diabetic state with a single dose of STZ intraperitoneal injection (55 mg/kg body weight) and receiving Lcarnitine 100 mg per day. The aerobic exercise protocol including five sessions per week was administered. The heart tissues of the dependent variables were measured by ELISA 24 hours after the last session of the exercise program. One-way ANOVA and Tukey's post hoc test at P -value< 0.05 were used to analyze the data. Results: result show that aerobic exercise and L-carnitine consumption have a significant effect on BAX ( P -value= 0.001), Bcl-2 ( P -value= 0.001), and SOD ( P -value= 0.001) in diabetic rats. Conclusion: The results of the present study confirm the role of aerobic exercise and L-carnitine in improving the indices of apoptosis and oxidative stress in type 2 diabetic rats.

PURPOSE The present study compared the effects of 2 different high-intensity interval training (HIIT) protocols on arterial stiffness, lipid profiles, and inflammatory markers in hypertensive patients. METHODS Thirty hypertensive (stage 1) patients, aged 48.0 ± 3.2 yr, were randomly allocated to the short-duration HIIT (SDHIIT, n = 10), long-duration HIIT (LDHIIT, n = 10), and control (n = 10) groups. After a 2-wk preparatory phase of continuous mild training, patients in the SDHIIT group performed 8 wk of HIIT including 27 repetitions of 30-sec activity at 80% to 100% of (Equation is included in full-text article.)O2peak interspersed with 30-sec passive/active (10%-20% of (Equation is included in full-text article.)O2peak) recovery. Patients in the LDHIIT group performed 8 wk of HIIT, 32 min/session including 4 repetitions of 4-min activity at 75% to 90% of (Equation is included in full-text article.)O2peak interspersed with 4-min passive/active (15%-30% of (Equation is included in full-text article.)O2peak) recovery. Blood pressure (BP), pulse wave velocity (PWV), inflammatory markers, and lipid profiles were measured before and after training. RESULTS Significant (P < .05) reductions in systolic blood pressure and PWV were found following 2 training protocols, though, only the changes in PWV following the SDHIIT were significantly different than those in the LDHIIT and control groups. Interleukin-6 and triglycerides decreased and interleukin-10 increased significantly (P < .01) following both HIIT programs, whereas the differences between the 2 training protocols were not statistically significant. C-reactive protein and lipids did not change significantly following HIIT. CONCLUSIONS Performing HIIT improves systolic blood pressure and inflammatory markers in patients with stage 1 hypertension irrespective of the HIIT intensity and duration, and PWV improvement is intensity related.

Background: The aim of the present study was to investigate the effect of time of day on ischemic response, and exercise test indexes in persons with symptoms of chronic stable angina. Methods: We selected 24 volunteers with symptoms of chronic stable angina aged 45 to 65 years with average age of 55.4 ± 6.2. All the participants performed exercise test with treadmill (Bruce protocol) at two times, morning (8-10 am) and evening (3-5 pm) with interval of 96 hours. Considering individual ischemic responses (rate of ST segment depression during recovery and testing, starting stage of changes, and the number of leads with ST segment depression), the risk of developing coronary artery disease (CAD) was graded as negative, and low-risk and high-risk positive, and eventually the risk of CAD development and change of exercise test indexes [metabolic equivalents (METs), heart rate, blood pressure, rate-pressure product (RPP), time, distance, and rate of perceived exertion] were compared between morning and evening exercise tests. Findings: The subjects developed more intense ischemic response in the evening exercise test (rise of ST segment depression, the start of ST segment depression at earlier stage, and increasing number of leads) (P < 0.5). But exercise test indexes did not show any significant change between morning and evening exercise test (P > 0.5). Conclusion: Ischemia response is considered as the most important achievement of exercise test, subject to the time of exercise test, but it is not clear enough that which test (morning or evening) is well indicative of coronary artery stenosis, so it needs to be investigated further.

Objective: Type2 diabetes (T2DM) as a metabolic disease is associated with absolute or relative insulin deficiency, increased blood glucose and carbohydrate metabolism disorders which is considered as risk factors of other diseases such as cardiovascular diseases. In the present study, the effect of eight weeks of high intensity interval training (HIIT) on lipid profile (TG, LDL and HDL), glucose and glycated hemoglobin (HbA1c) levels in streptozotocin-induced diabetic rats was investigated. Materials and Methods: Sixty male Wistar rats were randomly divided into six groups: healthy, diabetic, diabetic + metformin, healthy + training, diabetic + training and diabetic + training + Metformin. The training groups performed eight weeks of HIIT. Metformin was given 150 mg / kg to the rats by gavage every day. T2DM was induced by injection of nicotinamide and streptozotocin and 48 hours after the end of last training session, the rats were sacrificed. Then lipid profile, blood glucose and HbA1c were measured. One way analysis of variance (ANOVA) test was used for statistical analysis. Results: The results of this study showed that TG levels were low in diabetic training and diabetic + training + metformin groups compared to the diabetic group (P-value: 0.0001). There weren't any significant differences between total cholesterol, LDL-c and HDL-c levels between groups. Blood glucose levels were significantly lower in diabetic + training and diabetic + training + metformin groups compared to diabetic controls (P-value: 0.0001). HbA1c levels were significantly lower in diabetic + training and diabetic + training + metformin than in diabetic group (P-value: 0.0001). Conclusion: According to the results of this study, it seems that severe periodic exercise can be considered as an important strategy for improving lipid profiles and blood glucose control in T2DM patients.

Introduction: Telomeres are DNA portions that are located on the two ends of the chromosome. Telomeres play an important role in cellular life. Exercise is one of the factors that contributes to their control. The purpose of the present study was to investigate the effect of 8 weeks of high intensity interval training (HIIT) on telomere length and telomerase activity in non-athletic young men. Materials and methods: 30 inactive students were selected as sample and randomly divided into two groups of exercise (15 people) and control (15 people) in this semi-experimental study. The exercise group performed 8 weeks of HIIT exercise in 3 sessions per week with an intensity of 150 to 175% of their maximum power (Pmax). Control group subjects did not do regular sport activities. To measure telomere length and telomerase activity, 10 ml of blood was taken from the brachial vein of the subjects 24 hours before the first and after the last exercise session. The dependent t was used to analyze intra-group and independent t for within-group differences. Results: The findings of this study showed that 8 weeks of HIIT training in non-athlete young men resulted in a significant increase in telomere length (P = 0.001) and telomerase activity (P = 0.001). Conclusion: It seems that HIIT can alter telomerase activity and telomere length. Therefore, these training may have a positive effect on cell biology.

Introduction: Myocardial infarction (MI) is associated with increased oxidative stress and reduced antioxidants. Some studies have shown that exercise training increases the serum level antioxidants. Therefore, this study investigated the effect of rehabilitation training on antioxidant status in patients with myocardial infarction. Materials and methods: In this study, 20 patients with myocardial infarction were selected and randomly assigned to training group (n=10) or control group (n=10). Training program included 3 sessions of concurrent training per week for eight consecutive weeks. To measure the values of malondialdehyde (MDA), protein carbonylation (PC) and total antioxidant capacity (TAC), 10 ml of blood were taken pre- and post-training in each patient. The t-test was used to analyze the data. P

Physical activity could be considered one of the factors that affect the immune system status and function. To find the relation between exercise and cytokines, we examined the possible effects of an 8-week endurance training program on the serum levels of cytokines, including tumour necrosis factor-alpha (TNF-α) and interferon-gamma (IFN-γ) in sedentary men. A total of 30 healthy young male volunteers were randomly divided into an endurance training group and a control group. The training group followed a specific exercise protocol (running on a treadmill for 15~30 min at 50~70% maximal heart rate) for 8 weeks and the control group did not participate in any exercise program. Venous blood samples were collected from both the groups 24 h before and 24 h and 48 h after the exercise. Repeated ANOVA was used for statistical purposes. The serum levels of TNF-α and IFN-γ were determined by ELISA. Significant (p0.05) decreases were observed in the serum levels of IFN-γ and TNF-α, respectively, after the 8-week endurance training program. Our findings indicated that an 8-week endurance exercise may affect the serum levels of some inflammatory cytokines, suggesting the beneficial role of this training protocol in elderly population and people with certain conditions (inflammation of the vertebrae or other inflammatory diseases).

Regular exercise training has been shown to reduce systemic inflammation, but there is limited research directly comparing different types of training. The purpose of this study was to compare the effects of nonlinear resistance training (NRT) and aerobic interval training (AIT) on serum interleukin-10 (IL-10), IL-20, and tumor necrosis factor-α (TNF-α) levels, insulin resistance index (homeostasis model assessment of insulin resistance), and aerobic capacity in middle-aged men who are obese. Sedentary volunteers were assigned to NRT (n = 12), AIT (n = 12), and (CON, n = 10) control groups. The experimental groups performed 3 weekly sessions for 12 weeks, whereas the CON grouped maintained a sedentary lifestyle. Nonlinear resistance training consisted of 40-65 minutes of weight training at different intensities with flexible periodization. Aerobic interval training consisted of running on a treadmill (4 sets of 4 minutes at 80-90% of maximal heart rate, with 3-minute recovery intervals). Serum IL-10, IL-20, and TNF-α levels did not change significantly in response to training (all p > 0.05), but IL-10:TNF-α ratio increased significantly with AIT compared with CON (2.95 ± 0.84 vs. 2.52 ± 0.65; p = 0.02). After the training period, maximal oxygen uptake increased significantly in AIT and NRT compared with CON (both p < 0.001; 46.7 ± 5.9, 45.1 ± 3.2, and 41.1 ± 4.7 ml·kg·min, respectively) and in AIT than in NRT (p = 0.001). The 2 exercise programs were equally effective at reducing insulin resistance (homeostasis model assessment for insulin resistance) (both p ≤ 0.05; AIT: 0.84 ± 0.34, NRT: 0.84 ± 0.27, and CON: 1.62 ± 0.56) and fasting insulin levels (both p ≤ 0.05; AIT: 3.61 ± 1.48, NRT: 3.66 ± 0.92, and CON: 6.20 ± 2.64 μU·ml), but the AIT seems to have better anti-inflammatory effects (as indicated by the IL-10:TNF-α ratio) compared with NRT.

Objectives: In this study for surveying the relation between exercise and immune cell, we examine the effect of Effect of 8 weeks endurance training on immune system cell changes with recovery period. Study design: Experimental study Methods: participant of this research including health and yang males that were randomized divided into two groups :( ETG) endurance training groups with 15 men; and (CG) 13 men in to control group. Different factor of anthropometric characteristics (i.e. age, weight & height) and also white blood cell (i.e. lymphocyte, neutrophils, monocytes) were experimented. In this study, subjects, runs on a treadmill for 15-30 min at 50 % - 70% maximal Heart rate for 8 weeks, with Venous blood sample was taken at pre, post and at 24- hours and 48-hours after exercise. For data analyze, we used of one -way using repeated-measurements ANOVA, in SPSS12. And also Significance was evaluated as P < 0.05.In addition, all values are expressed as mean ± standard deviation. Results: we found that lymphocyte level increased after 4th week and 48h-recovery, but decreased after 8th week (Mid-exercise), and 24h- recovery in exercise group. Also levels of Neutrophils and Monocytes decreased after after 4th week (Mid-exercise), post- exercise (8th week), 24h- recovery and 48h-recoveries in exercise group. Conclusion: These data demonstrate that a period endurance exercise leads to Levels changes of leukocytes after exercise and recovery period, but these changes not significant.

Background: High-intensity interval training (HIIT) is a time-ecient alternative to traditional prolonged training. In contrast to ample evidence describing the eects of prolonged training, there are few data describing cardiovascular adaptations arising from HIIT interventions. Objectives: The present study aimed to evaluate the eects of HIIT on heart morphology and function in untrained male subjects. Patients and Methods: Twenty-two young men (age = 23.34 2.56 years, weight = 72.47 12.01 kg, and height = 174.10 5.75 cm) were recruited and randomly assigned into control (n = 10) and HIIT (n = 12) groups. Echocardiography was used to evaluate left ventricular mass (LVM), end-systolic volume (ESV), end-diastolic volume (EDV), interventricular septal wall thickness (IVSWT), stroke volume, and ejection fraction (EF). Also, the Bruce treadmill test was employed to estimate VO2max. Results: The HIIT subjects showed a significant increase in EDV (P = 0.001), LVM (P = 0.002), stroke volume (P = 0.003), and EF (P = 0.001). However, there was no change in ESV due to HIIT (P = 0.916). Additionally, following HIIT, IVSWT (P = 0.227), despite exhibiting a slight increase, was not significantly dierent from pre-training levels. Conclusions: HIIT in previously untrained subjects led to a significant change in left ventricle (LV) morphology, correlating with improvement in aerobic power (VO2max). Cardiac remodeling was characterized by an increased EDV and a similar increase in LVM.

Exercise training is an effective method of weight management, and knowing about its influence on the hormones involved in the regulation of food intake and inflammation could be useful for body weight management. Therefore, the purpose of this study was to compare the effects of 6 weeks of high-intensity interval training (HIIT) and moderate-intensity continuous exercise training (MCT) on nesfatin-1, interleukin (IL)-6, and tumor necrosis factor alpha (TNF-α).Thirty sedentary overweight men (Mean±SD; age, 25±1 years) were divided into three (n=10) body mass index-matched groups. The participants in the training groups performed either HIIT or MCT protocols 3 days per week for 6 weeks followed by a week of detraining.Plasma IL-6 and TNF-α did not significantly change after training, but nesfatin increased significantly only with HIIT compared with the control group (pBoth the HIIT and MCT groups had similar effects on inflammatory markers and insulin resistance in men who are overweight, but the HIIT seems to have better anorectic effects (as indicated by nesfatin) compared with MCT.

OBJETIVO: Examinar o efeito de 12 semanas de (3 dias/sem) de treinamento concorrente e 4 semanas de destreinamento nas concentrações séricas de adiponectina e níveis de condicionamento físico em meninos obesos sem intervenção dietética. MÉTODOS: vinte e quatro meninos saudáveis, 11-13 anos de idade com índice de massa corporal > 28 participaram voluntariamente do estudo. Estes foram divididos em dois grupos, experimental (n= 12) e controle (n=12). RESULTADOS: Concentrações de adiponectina após 12 semanas tiveram declínio significativo em ambos os grupos em comparação com o nível basal (p < 0,05). VO2 pico, flexibilidade, força, endurance de abdominais e agilidade aumentaram significativamente no grupo experimental comparado com o grupo controle (p < 0.05). Foi evidenciado que após destreinamento de 4 semanas, a adiponectina sérica não se alterou significativamente no grupo experimental e que condicionamento físico benéfico foi gradualmente diminuído. CONCLUSÃO: Nossos resultados sugerem que os efeitos benéficos do exercício físico no condicionamento são temporários. Uma vez que o processo de adaptação é reversível, parece que as concentrações de adiponectina foram inevitavelmente afetadas pelas alterações morfológicas e hormonais que ocorreram durante a puberdade em meninos.

The purpose of the study was to determine the effects of modified Proprioceptive Neuromuscular Facilitation (PNF) flexibility techniques on hip flexion in college males and to determine if local cold application enhances the effectiveness of these techniques. Male subjects (N = 120), with an average age of 21.5 +/- 2.7 years, were randomly assigned to one of four different kinds of stretching treatments with cold or no cold application (15 per group). Range of motion (ROM) in degrees was determined following four stretching techniques: three modified PNF (PCP, 3-PIECP, 3-PIFCP) and a passive stretch (P). Data were analyzed using a 2 (conditions) x 4 (treatments) ANOVA. There were no significant differences in ROM between cold and no cold conditions. Significant differences existed among ROM techniques (p less than .05). Post hoc analyses revealed that the three modified PNF techniques resulted in greater ROM than the passive stretch technique. However, we conclude that cold application does not influence the effectiveness of selected stretching techniques.

Delayed-onset muscle soreness refers to the skeletal muscle pain that is experienced following eccentric exercise. The aim of the present study was to examine the physiological effects of physical activity with or without ibuprofen on delayed onset muscle soreness. Forty-four non-athletic male volunteers (age 24.3 +/- 2.4 years) were randomly assigned to one of four groups: physical activity (n = 11), ibuprofen (n = 11), physical activity and ibuprofen (combination, n = 11), or control (n = 11). The physical activity programme comprised 5 min of walking and jogging, 10 min of static stretching of the hands and shoulder girdle, and 5 min of concentric movements with sub-maximal contractions. The total amount of ibuprofen consumed by a single individual was 2800 mg; this was taken from 1 h before the eccentric actions up to 48 h after it. Delayed onset muscle soreness was induced by performing 70 eccentric contractions of the biceps muscle of the non-dominant side on a modified arm curl machine. Perceived muscle soreness, maximal eccentric contraction, creatine kinase enzyme activity and elbow range of motion were assessed 1 h before and 1, 24 and 48 h after the eccentric actions. The results indicated that, after the eccentric actions, soreness increased (P0.001) across time in all groups, with the highest values being recorded at 24 h. At 24 and 48 h, greater soreness (P0.001) was observed in the control group than in the physical activity and combination groups. After the eccentric actions, creatine kinase increased and was elevated (P0.001) compared with baseline in all groups, with values returning to baseline in the physical activity and combination groups by 48 h. However, creatine kinase in the control and ibuprofen groups was still significantly higher than at baseline after 48 h. Creatine kinase was higher (P0.001) in the control group than in physical activity and combination groups at 24 and 48 h. There was also a reduction (P0.001) in elbow range of motion across time. This reduction in elbow range of motion was greater (P0.001) in the control and ibuprofen groups than in the physical activity and combination groups at 1, 24 and 48 h. The reduction in maximum eccentric contraction was greater (P0.001) in the control and ibuprofen groups than in the physical activity group at 24 and 48 h and the combination group at 48 h. In conclusion, the results add to our understanding of the effects of physical activity and the combination of physical activity and ibuprofen in reducing the severity of muscle soreness induced by eccentric exercise. Physical activity conducted before eccentric exercise alleviates muscle soreness. Our results indicate that physical activity with or without ibuprofen helps to prevent delayed-onset muscle soreness.

The purpose of this study was to compare the effects of nonlinear resistance training (NRT) and aerobic interval training (AIT), and detraining on selected inflammatory markers in men who are middle aged and obese. Subjects first were matched by aerobic capacity, age, and percentage body fat and then randomly assigned to NRT (n = 12), AIT (n = 10) and, control (CON, n = 11) groups. The experimental groups performed 3 weekly sessions for 12 weeks followed by a 4-week detraining period. Nonlinear resistance training consisted of 40-65 minutes of weight training with flexible periodization. Aerobic interval training consisted of running on a treadmill (4 x 4 minutes at 80-90% maximal heart rate, with 3-minute recovery intervals). Compared with CON, serum levels of interleukin 6 (IL-6), C-reactive protein (CRP), and tumor necrosis factor alpha (TNF-[alpha]) did not significantly change after training, but adiponectin (ADPN) increased significantly only with AIT (5.09 +/- 2.29 vs. 4.36 +/- 0.84 [mu]g[middle dot]ml-1). No significant changes in CRP and TNF-[alpha] occurred in both training groups after detraining, but ADPN (NRT: 3.6 +/- 1.2 and AIT: 3.4 +/- 1.7 vs. CON: 4.7 +/- 1.2 [mu]g[middle dot]ml-1) and IL-6 (NRT: 5.8 +/- 3.3 and AIT: 5.5 +/- 2.9 vs. CON: 2.3 +/- 1.2 pg[middle dot]ml-1) worsened significantly. Both the AIT and NRT were equally effective at reducing soluble intercellular cell adhesion molecule 1 (NRT: 187.2 +/- 117.5 and AIT: 215.2 +/- 142.4 vs. CON: 416.2 +/- 205.9 ng[middle dot]ml-1) and insulin (NRT: 4.0 +/- 1.0 and AIT: 4.8 +/- 2.7 vs. CON: 7.4 +/- 3.0 [mu]U[middle dot]ml-1) levels, but these variables returned to the pretraining levels after detraining. The practical applications are that both the AIT and NRT and detraining had similar effects on most inflammatory markers in men who are obese, but the AIT seems to have better anti-inflammatory effects (as indicated by ADPN) compared with NRT.