ผลของการฝึกพลัยโอเมตริกบนบกและในน้ำที่มีต่อพลังระเบิดของกล้ามเนื้อขาและความเร็วในการว่ายน้ำท่ากบระยะทาง 50 เมตรของนักกีฬาว่ายน้ำชาย / สุทธิดา เจริญผล = Effects of land and aquatic plyometric training on leg muscular explosive power and 50 metres breaststroke speed of male swimmers / Sutida Charoenphon
The purpose of this research was to study and compare the effects of land plyometric training and aquatic plyometric training on leg muscular explosive power and 50 metres breaststroke speed of male swimmers. Twenty male swimmers aged between 15-18 years who were members of Suphanburi Sports School swimming team participated in this study. They were randomly assigned into two groups, according to their 50 metres breaststroke speed. The first group performed plyometric training on the land whereas the second group performed plyometric training in the water. Both groups were trained twice a week for a period of eight weeks. Vertical ground reaction force, take-off velocity, leg muscular explosive power and 50 metres breaststroke speed were taken before and after the experiment. The obtained data were analyzed in term of means and standard deviations and t-test was employed to determine the significant differences of the data before and after the experiment and between the experimental groups.
After eight weeks of experiment, the results indicated that : 1. Vertical ground reaction force, take-off velocity and leg muscular explosive power in land plyometric training group and aquatic plyometric training group were significantly better than before training at the .05 level. 2. Vertical ground reaction force, take-off velocity, leg muscular explosive power and 50 metres breaststroke speed were not significant differences at the .05 level between land plyometric training group and aquatic plyometric training group.
Conclusion : Aquatic plyometric training provided the same performance enhancement benefits as land plyometric training.