چکیده:
The purpose of the present study was to investigate the changes in dynamic movement performance following a sequence of different warm-up procedures. Twelve healthy, active, and non-athletic female subjects (age: 16±1 years, height: 162 cm ±6.34, weight: 60 kg ±9.21) were voluntarily selected. The subjects participated in two warm-up protocols with one week interval. The first protocol included performing 5 repetitions at 50% and 2 repetitions at 75% of one repetition maximum of the squat movement, and the second protocol included performing 5 repetitions at 60% and 2 repetitions at 90% of one repetition maximum for warm-up. The subjects performed Sargent and Bosco 5, 15, 30, and 60-second tests. The results showed that the second protocol created more significant changes in all five tests compared to the first protocol (P<0.01). The percentage of changes or difference between the two groups was less in the Sargent test (19.05%), Bosco jump 5 seconds (15.20%), 15 seconds (14.58%), 30 seconds (11.37%), and 60 seconds (11.06%), respectively. In general, it can be concluded that in performing warm-up protocols, the higher the intensity, the better the subsequent dynamic performance will be, and it seems that the effect of warm-up protocols decreases over time.
خلاصه ماشینی:
Assistant Professor, Department of Exercise Physiology, Islamic Azad University, Boroujerd Branch, Boroujerd, Iran Abstract The purpose of the present study was to investigate the changes in dynamic movement performance following a sequence of different warm-up procedures.
Considering the results of previous studies, the performance of PAP depends on the type (isometric, dynamic) and intensity (percentage of maximal voluntary contraction), the type of subjects (men and women), the level of fitness (athlete or non-athlete), the duration of the subsequent activity (the length of time the athletic activity lasts), and the time between PAP and the execution of dynamic exercise.
2. 90 Percent Protocol Since there was a possibility of neural adaptation affecting the strength and power of the subjects, one repetition maximum of the leg squat exercise was recalculated based on the previous procedure before performing protocol 2.
The results of the paired t-test showed a significant difference between the effects of the two different pre-training protocols on vertical jump (P = 0.
42 Discussion In the present study, the hypothesis that the effects of two pre-trainings at 75 and 90 percent of one repetition maximum on muscle power are different was tested.
(2005), the intensity of the pre-training contraction in the present study was also 75 and 90 percent of voluntary maximal contraction and less than 10 seconds, which likely did not cause any fatigue or post-activation depression 1.
Conclusion The results of the present study showed that loading with 90 percent of one repetition maximum has a greater effect on Sargent jump, Bosco 5, 15, 30, and 60 seconds.
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