Author(s): WANG, H., LIU, C.H., LIU, Y.L., Institution: NATIONAL TAIWAN SPORT UNIVERSITY, Country: TAIWAN, Abstract-ID: 337

INTRODUCTION:
Passive leg press (PLP) training can overcome the problem that general resistance training cannot accurately control the "movement speed" and cannot train at a fast speed when carrying heavy loads. PLP training has been proven to enhance velocity and explosive power in athletes. However, do different training speeds of PLP training to muscular failure enhance skeletal muscle mass, muscular endurance and kicking performance? Not confirmed by research. The aim of the present study was to identify which of three training speeds of PLP training leads to the best training effects on skeletal muscle mass, endurance strength and kicking performance in Taekwondo athletes.
METHODS:
thirty taekwondo athletes were recruited and divided into high training speed group (HTSG, n=10), normal training speed group (NTSG, n=10), low training speed group (LTSG, n=10). All subjects complete 12 weeks,3 times a week training program which consisted of 60% MVIC load but three different training speed and perform to muscle failure. Before and after training, muscle mass, dynamic endurance (average height of continuous countermovement jumps), static endurance (duration time of >80% MVIC), specific continuous kicking ability (speed and average peak force of continuous kicking) were collected for statistical analysis. The Paired Samples t-Test was used to compare the difference between pre-test and post-test. Percentage of training effects among groups were analyzed with Analysis of Variance, ANOVA and Bonferroni post hos test. The level of significance was set at α = .05.
RESULTS:
Muscle mass did not significantly improve in LTSG (P>.05), but all other dependent variables were significantly enhanced (P<.05). All dependent variables were significantly enhanced in both of NTSG and HTSG (P<.05). Besides, the percentage of training effect of kicking speed in HTSG were significantly greater than in the LTSG.
CONCLUSION:
The training methods of passive leg press training to muscle failure at different training speeds could improve dynamic endurance, static endurance, and specific continuous kicking ability. Training speed during resistance training is a key factor that affects improvement of muscle mass. Low speed training cannot significantly improve muscle mass. The speed during resistance training is also a factor that affects the improvement of specific kicking speed. High speed training is the optimal training intensity when the coach wants to transfer the effects of resistance training to specific kicking abilities.