Abstract:
The purpose of this research was to study the effects of eccentric training on leg muscular fitness in male tennis players. Twenty male tennis players were purposively sampled to be subjects in this study. They were divided into two groups, each group of ten players, by on simple random sampling. In addition to the regular training program, the first group worked with combined eccentric training and concentric training. The second group did eccentric training. Both groups trained two days a week for a period of eight weeks. The data of leg muscular strength per body weight, speed, leg muscular power and agility were taken before experiment, after the fourth and eighth weeks. The obtained data were analyzed in terms of means and standard deviations, one-way analysis of variance with repeated measure and multiple comparison by the tukey (a) were also employed for statistical significant. Research results indicated that:1. After fourth and eighth weeks of experimental. Leg muscular strength per body weight in the eccentric training group was significantly better than the combined eccentric training and concentric training group at the .05 level. 2. Before the experimental, speed in the combined eccentric training and concentric training group was significantly better than the eccentric training group at the .05 level. But after eighth weeks of experimental, there was no significant difference in speed at the .05 level among 2 experimental groups. 3. After eighth weeks of experimental, leg muscular power in the eccentric training group was significantly better than the combined eccentric training and concentric training group at the .05 level. 4. After eighth weeks of experimental, agility in the eccentric training group was significantly better than the combined eccentric training and concentric training group at the .05 level.