Abstract
The main goals of strength training are improving muscle strength, power and muscle endurance. The objective of the current study is to compare two popular linear and nonlinear resistance exercises interventions on the anaerobic power. Previous research has shown differences intervention by the linear and non-linear resistance exercise in performance and strength in male athletes. By the way there are not enough data regarding female subjects. Eighteen young women subjects participated in this study. The subjects were randomly divided in two linear (n=8) and nonlinear (n=10) groups. An 11-week exercise protocol was applied in both groups. The anaerobic power and the body composition variables were measured in the pre and posttests. The results of this research substantiated that there was no difference in the peak anaerobic power between the linear and nonlinear models of the resistance exercise. The results of the current study proved greater improvement in the nonlinear model in contrast to the linear one in two groups at the final phase of the exercise [F(1,16)=6.270 , p=0.023]. Greater improvement of the anaerobic power in the undulating group may have been influenced by less overtraining risk in the nonlinear model. The increase of the muscle and lean body mass (LBM) directly improved the anaerobic power by increasing the Atp-pc energy system. It was also observed that the nonlinear model of the resistance exercise experienced noticeable improvement in the body composition. Both linear and non-linear models of resistance exercise improve anaerobic power, but at difference's situation coach and researcher should choose the best method according to type of sport and competition's season. Keywords: Anaerobic power, Energy system, resistance exercise, performance
Highlights
The energy system in human body helps the cells to provide energy in different types of physical workouts and daily activities (Kenney, Wilmore, and Costill, 2015)
There is a plethora of research reporting the positive effect of resistance exercise on the anaerobic power and anaerobic performance
Significant differences were observed between the peak anaerobic power from pre to post test in the nonlinear model (pre-test; (M=227.203, SD=58.53), post-test; (M=340.26, SD=53.32 . [T(9)=17.024, p=0.000]
Summary
The energy system in human body helps the cells to provide energy in different types of physical workouts and daily activities (Kenney, Wilmore, and Costill, 2015). ATP-Pcr, Aerobic and Lactic Acid are three of main energy systems in human bodies which differ from each other. Additional research has shown that the resistance exercise may improve the anaerobic power by increasing the lean muscle mass and the creatine concentration on the cells (Chromiak et al, 2004; Docherty, Wenger, and Collis, 1987). Several resistance exercise strategies and systems help the coaches and athletes to achieve their peak of performance in competitions. There is a plethora of research reporting the positive effect of resistance exercise on the anaerobic power and anaerobic performance Some of these systems and strategies have been reported to be more effective than the others. The linear model of periodization is more popular in sports but recent
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