Effects of isotonic, isometric, and isotonic plus isometric weight training methods on anaerobic power, anaerobic capacity, exhaustion time, and leg strength
Abstract:
The purpose of this study was to a compare the effets of weight training methods (isotonic, isometric, and isotonic plus isometric) on anaerobic power, anaerobic capacity, exhaustion time, and leg strength. The subjects were 40 male students member, 18-25 years of age, from the Music & Heart Exercise Clinic, Bangkok. The subjects were divided into 4 groups though randomized assignment, according to anacrobic power, anaerobic capacity, exhaustion time, and leg strength. Each group comprised 10 student members : Group I was the control group, Group II did isotonic exercise, Group III did isometric exercise, and Group IV did isotonic plus isometric exercise. Experimental groups were trained three days a week for a period of six weeks. The data of anaerobic power, anaerobic capacity, exhaustion time, and leg strength of all groups were obtained before and after the third and sixth weeks for analyzing the means and standard deviations of each parameters, two-way within subject design and multiple comparison of Tukey method were also employed for statistical analysis. Significant level was set at .05.The results indicated that after the sixth week of experiments, there were significant differences among the 4 groups on anaerobic power, anaerobic capacity, exhaustion time, and leg strength. However, when comparing in pair, there were significant differences on anaerobic power, anaerobic capacity, exhaustion time, and leg strength among the control group and the first, second, and third experimental groups. However, there were no significant differences in all varialbes on anacerobic power, anaerobic capacity, exhausion time, and leg strengh among the first experimental group the second experimental group and the third experimental group.In regard to the existing data led to a conclusion in terms of anaerobic sports, isometric muscle training should be included since isometric muscle training tended to increase both anaerobic power and exhaustion time.