No abstract

Background: High intensity interval training (HIIT) has been widely employed as an exercise protocol to reduce fat, and also in addition, interval recovery periods are the most important factors which can have great impact on weight loss. Therefore, the aim of this study was the evaluation of different recovery time between HIIT program on metabolic responses and weight loss in overweight women. Methods: Twenty-four overweight (BMI 29.5±3.5 kg/m2) volunteer women were randomly assigned into three groups (n=8/group) to study the effects of different recovery times: (group 1; HIIT with 60/60 activity-rest ratio (sec), group 2; HIIT with 60/30 activity-rest ratio (sec), and group 3 was set as a control. The participants performed 3 times per week 4 bouts/session (80% of Heart Rate Reserve). The exercise program gradually increased to 10 bouts/session. Results: The most important findings of this study were a change in the Body fat percentage (BF %) in the between group comparison: group1 (40.5±0.9), group 2 (41.2±0.7) and group 3 (41.1±1.1). Compared to the control group the 60/30 sec HIIT resulted in a significant decrease in BF % (p=0.002). However, no other significant differences in the body composition were found. Either there were no significant differences between the groups in T4, T3 and TSH, cortisol, HGH, FBS, blood insulin, insulin resistance insulin sensitivity or fatnessassociated hormones. Conclusions: In conclusion, considerable decrease in BF % in the 60/30 sec. rest interval group indicates that 30 sec recovery period in HIIT may reduce fat % more efficiently than 60 sec.

Abstract. Physical exercise increases free radicals production; antioxidant supplementation may improve the muscle fiber’s ability to scavenge ROS and protect muscles against exercise-induced oxidative damage. This study was designed to examine the effects of all-trans resveratrol supplementation as an antioxidant to mediate anti-oxidation and lipid per-oxidation responses to exercise in male Wistar rats. Sixty-four male Wistar rats were randomly divided into four equal number (n = 16) including training + supplement (TS), training (T), supplement (S) and control (C) group. The rats in TS and S groups received a dose of 10 mg/kg resveratrol per day via gavage. The training groups ran on a rodent treadmill 5 times per week at the speed of 10 m/min for 10 min; the speed gradually increased to 30 m/min for 60 minutes at the end of 12th week. The acute phase of exercise protocol included a speed of 25 m/min set to an inclination of 10° to the exhaustion point. Superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT) activity, non-enzymatic antioxidants bilirubin, uric acid, lipid peroxidation levels (MDA) and the total antioxidant capacity (TAC) were measured after the exercise termination. The data were analyzed by using one-way ANOVA. The result showed that endurance training caused a significant increase in MDA level [4.5 ± 0.75 (C group) vs. 5.9 ± 0.41 nmol/l (T group)] whereas it decreased the total antioxidant capacity [8.5 ± 1.35 (C group) vs. 7.1 ± 0.55 mmol/l (T group)] (p = 0.001). In addition, GPx and CAT decreased but not significantly (p > 0.05). The training and t-resveratrol supplementation had no significant effect on the acute response of all variables except MDA [4.3 ± 1.4 (C group) vs. 4.0 ± 0.90 nmol/l (TS group)] (p = 0.001) and TAC [8.5 ± 0.90 (C group) vs. 6.6 ± 0.80 mmol/l (TS group)] (p = 0.004). It was concluded that resveratrol supplementation may prevent exercise-induced oxidative stress by preventing lipid peroxidation.

No abstract

Background and objectives: Stroke is one of the leading causes of death and long-term acquired disability. It is of great importance to seek ways for improving motor, sensory, and cognitive function after stroke and brain injury. In this regard, therapeutic exercise is the most commonly used method of rehabilitation that can significantly reduce the severity of functional damage. The aim of the present study was to investigate effects of eight weeks of forced treadmill training on cognitive and motor functions in ischemic rats.Methods: Fourteen adult male Wistar rats were divided into an exercise group and a control group (no exercise). Occlusion of both common carotid arteries was made to induce cerebral ischemia. Twenty-four hours after the induction of ischemia, the subjects in the exercise group were subjected to treadmill running, five days a week for eight weeks. The skilled ladder rung walking task was used to evaluate motor function before and after the stroke.Results: The number of errors was decreasing in both groups, but significant differences were observed in the motor function between the two groups in the third, fifth, and eighth week.Conclusion: Our results suggest that post-ischemic exercise might modulate ischemia-induced hippocampal injury and ameliorate the subsequent memory and motor impairment.