Msc Ashkan Koushki, Professor Hamid Aghgaalinegad, Professor Reza Gharakhanlou3,
Volume 0, Issue 0 (11-2019)
Abstract
Aim: Optimal performance is the ultimate goal of athletes. The purpose of this study was to compare the effects of different high-intensity interval training (HIIT) protocols on athletic performance and metabolic adaptations. Methodes: The participants were divided into 4 groups: High-Intensity Running Training (HIITRUN), Sport-Specific High-Intensity training (HIITSPORT), Combined Training (HIITSPORT+RUN), and Control. The measured indicators included: maximum running speed in the 30-15 test (VIFT), maximum oxygen consumption (VO2max), the SWFT index and throws in the sport-specific wrestling fitness test, fatigue index, and maximal lactate. Comparisons between dependent variables were performed using a two-way analysis of variance (group and time) with repeated measures. Result: Significant changes in (VIFT) and VO2max were observed in HIITSPORT+RUN (P<0.05) and HIITRUN (P<0.05) compared to pre-training, control, and HIITSPORT. The fatigue index showed a significant decrease in HIITSPORT+RUN and HIITRUN compared to pre-training in the other groups. HIITSPORT+RUN (P<0.05) showed the greatest improvements in the SWFT index compared to HIITRUN and HIITSPORT, and the time-group interaction confirmed its superiority. Post-exercise lactate levels in HIITSPORT+RUN (P<0.05) were lower than in HIITRUN, but no significant difference was observed in the time-group interaction (P<0.05). The difference in maximal lactate levels before and after exercise in HIITSPORT+RUN (P<0.05) was lower compared to HIITRUN. HIITSPORT+RUN (P<0.05) showed better performance in the SWFT compared to pre-training. The fatigue index decreased in all training groups except for the control (P<0.05). Conclusion: the combined HIIT approach of sport-specific training and running is the most effective method for improving wrestlers' performance and metabolic adaptations.
H Rajabi, P Motamedi, D Zabihi,
Volume 18, Issue 19 (7-2020)
Abstract
The purpos of this study was to determine the effect of twelve session of high intensity cycle training with blood flow restriction on aerobic and anaerobic performance of active student men. To this purpose, 24 valentear active students men from physical eduction faculty of kharazmi university aged 19-23 years old, students (mean ± SD weight: 67.89±6 kg, height: 173.92±5.41cm, and BMI: 22.7±6.84kg/m2) divided into three groups of blood flow restriction (BFR) (n=8), none blood flow restriction(NBFR) (n=8) and control group (n=8). The exercise consisted of cycling at 80% Wmax for ten 1-min bouts, with a 2-min rest between bouts with 50% Wmax (total time, 30 min). Before and after implementation of the training protocol, Astrand Test to check the aerobic performance and Wingate test to check anaerobic performance was conducted. To data analysis, the independent t-test, analysis of variance test and post hoc test (LSD) was used. Results indicated that two weeks of high intensity cycling with and without blood flow restriction does have a significant impact on VO2max(p=0.000) and Wmax(p=0.000) and time to exhaustion (p=0.001). The results indicate a further increase in aerobic performance components, in exercise with blood flow restriction training group compared to the unrestricted blood flow training group. The results olso indicated that tow weeks of cycle training with occlusion does not have a significant impact on peak anaerobic power(p=0.064), average anaerobic power(p=0.058) and minimum anaerobic power(p=0.826). In general, the results showed a partial restriction of blood during cycling interval training have affect on aerobic adaptations, but does not affect on anaerobic adaptations.
