فصلنامه فیزیولوژی ورزشی
پیاپی 30 (تابستان 1395)

The aim of the Present study was to investigate the effect of resistance training on muscle strength in patients with prostate cancer. Twenty-four non-metastatic prostate cancer patients voluntarily participated in the study and randomly assigned into two group of 12; an experimental (mean ±SD, age73 ± 6.1 year, height 172.5 ± 5.2 cm, weight 75.4±8.6 kg) and control groups (mean ±SD, age72 ± 5.3 year, height 171.1 ± 8.3 cm, weight 75.5±6.8 kg). The experimental group performed resistance training for 10 weeks but the control group did not participate in any regular exercise. Before and after resistance exercise, muscle strength of biceps brachial, triceps, quadriceps and hamstring were measured using a hand dynamometer. In addition to this testosterone hormone also was evaluated. Independent and dependent t-test was used for analyzing the data. Significance was set on P

The purpose of this study was to compare the effects of accelerated plyometric, resisted plyometric, and common plyometric training on power performance, strength and muscle hypertrophy. Thirty active males (age 20.67±1.12, height 174.83± 4.69, weight 63.45± 7.51) volunteered to participate in this study. The participants were randomly divided among three groups and were matched according to the amount of activity in a week and maximal strength. The training protocol consisted of four weeks with three sessions per week. The posttest was performed after 48 hours of the last session. Intergroup differences were analyzed with ANCOVA and LSD post hoc tests, and intragroup difference analyzed with paired t-test. The findings of the present study indicated that all three plyometric training (accelerated, resisted and common) were significantly improved compared with pretest in squat jump, countermovement jump and depth jump height, countermovement jumping peak and average power, maximal strength and anthropometrically thigh muscle cross-sectional area. Resisted plyometric training was leads to significant improvements in depth jump height compared with accelerate and common plyometric training. In addition, accelerate and resisted plyometric training were significantly an improvement in maximal strength than common plyometric training regards to results and change percent, it seems use of elastic bands in plyometric training (accelerated and resisted) more beneficial than common plyometric training. Furthermore, accelerated plyometric is more efficient in improvement of power and muscular strength than the resisted and common plyometric training.

The purpose of this study was to investigate the effect of resistance exercise with vascular occlusion and without vascular occlusion on Lactate Deydrogenase, Creatine kinase in young girls. Hence, in a crossover research design, 14 young girls (age: 21±1.2 yr and BMI: 23±3.9 kg/m2), with one-week washout period randomly allocated into three conditions: control (CON), resistance exercise with vascular occlusion (REVO) and without vascular occlusion (RE). The exercise consisted of one session of lower limb resistance exercise (Hack, leg extension and leg press), 3 sets until exhaustion. For REVO, proximal end of thigh fastened with elastic tourniquet thorough out the exercise. The exercise intensity in REVO and RE was 20-30% and 70-80% of 1RM, respectively. The blood sample were taken before, immediately and 30 minutes after exercise in order to measuring CK and LDH concentration. Data were analyzed using repeated measures multivariate analysis of variance (P

The aim of this study was to investigate the effect of four weeks of detraining after one period of strength training with two loading patterns (double-pyramid & reverse step) on muscle strength, endurance, body composition and Hormonal changes in young wrestlers. For this aim, 14 wrestlers from city of Rasht participated in this study voluntarly (age 17.30± 2.42 years; height 170.41± 6.14 cm; weight 72.29±13 Kg; and BF% 12.39± 7.39). They had a history of training at least 6 months and were randomly divided in 2 groups; double-pyramid (7); and reverse step loading (7). Isotonic strength and endurance bench press and leg press, isometric hand and leg strength and endurance, Body composition and certain anabolic and catabolic hormones before and after a 8 weeks training period as well as after a 4 weeks detraining period are measured. Maximum strength and endurance isotonic and isometric between two training groups on upper body muscles; and lower body muscles after an 8 weeks training but after a 4 weeks detraining The factors mentioned decreased significantly (P

The present study examined the effects of swimming training on chronic constriction injury (CCI) of sciatic nerve in Wistar male rats. Forty Wistar eight-week rats were assigned into 5 groups: 1) CCI neuropathic pain with swimming training (CCIST); 2) CCI neuropathic pain without swimming training (CCI); 3) No CCI neuropathic pain with swimming training (ST); No CCI neuropathic pain without swimming training (Control); 5) CCI sham surgery (Sham CCI). CCI and CCIST groups underwent peripheral nerve injury by four loose ligatures around sciatic nerve. Swimming training program includes two weeks (5 sessions per week, 30-60 min per session). Behavioral tests included the study of mechanical and thermal hyperalgesia and allodynia, which was conducted every week. Statistical results showed that mechanical (P=0.023 and P=0.013, respectively) and thermal (P=0.013 and P

The aim of this study was to assess the agreement between the predicted VO2 by the means of the ACSM walking and running equations and criterion methods in active young men. Fifty active young men were selected as subjects (Mean ± SD Age 21.04 ± 2.069 yrs., Weight 70.11 ± 5.825 kg, Body Mass Index 22.36±3.21 kg/m2 and VO2max 51.08 ± 3.67 ml/kg/min) and completed an exhaustive treadmill test protocol. Walking and running data considered corresponding to the 2, 4, 6, 8, 10, 12, 14, 16, and 18 km/h. Bland-Altman graphical model and Interclass Correlation Coefficient (ICC) statistical tests were used to evaluate the absolute agreement of the two methods for predicted VO2. Findings showed lack of predicted VO2 agreements between ACSM equations and criterion methods during walking and running with the different speeds (walking: ICC= 0.422; ±1.96; 95% CI = -15 to .2 ml/kg/min; running: ICC= 0.045; ±1.96; 95% CI = -28 to -1.3 ml/kg/min). Based on the results, it can be concluded ACSM walking and running equations is not valid for predicting of VO2 in the Iranian young boys.

The aim of this study was to compare the effect of two different intensities of acute aerobic exercise on plasma Apelin concentration, blood glucose and insulin resistance in type 2 diabetic men. Twelve type 2 diabetic men were selected and assigned to perform acute aerobic exercise training (mean ±SD, n = 12 age, 52.6 ± 3.6 yrs; height, 171.3 ± 6.7 cm; weight, 87.6 ± 4.7 kg). Anthropometric measures and maximal oxygen uptake (vo2max) were measured using a modified Bruce test. Acute exercise training was performed in two sessions (two different intensities 50% and 80% vo2max). Before, immediately and 24 hours after each activity, blood samples to measure plasma Apelin level, insulin, glucose and HOMA-IR were collected. Following the end blood sampling, data analysis was performed with two-way ANOVA with repeated measures and P0.05). Also, finding showed no significant difference in blood glucose and insulin resistance index in intensity, time and the interaction between intensity and time. It seems that high intensity of acute aerobic exercise has significant effect on the plasma level of Apelin in type 2 diabetic men. Although no significant effect on glucose and insulin resistance was observed.

The purpose of this study was the preconditioning effect of aerobic exercise with d3 vitamin consumption on VEGF levels in the 6-ohda lesioned Parkinson's disease rat model. 48 male rats with the age of 7 weeks and weight 250-300 gr, randomly divided to 6 groups: healthy control, Parkinson’s control, sham, exercise -Parkinson, vitamin- Parkinson, exercise vitamin - Parkinson. The exercise groups, exercised for 4 weeks, 5 days per week for 30 minutes on treadmill at a speed of 15 meters per minute and with a slope of zero. The vitamin groups, received vitamin d3 for 4 weeks, 2 days per week and with a dose of 1 mg/kg of body weight. After 4 weeks of exercise and d3 vitamin consumption, was created an experimental model of Parkinson's disease using stereotactic surgery and injections of 6-hydroxy dopamine in the striatum. 3 weeks after this, Apo morphine rotational test was conducted in order to verify the parkinsonian rats and then were measured VGEF levels in the striatum by Elisa method after destruction and extraction of the striatum of the rats’ brain. The results show that, 4 weeks’ treadmill aerobic exercise with d3 vitamin consumption, before 6-hydroxy-dopamine induction, could significantly increase VGEF levels in the striatum (P≤0.005). In general, the results of this study showed that preconditioning with aerobic exercise with d3 vitamin can be caused increasing of dopaminergic neurons protection against degradation resulting of 6-hydroxy dopamine by increasing the levels of VGEF and play a protective role in Parkinson's disease.