The purpose of this study is to compare and analyze the changes in the isokinetic muscular function of knee joint of male
national alpine skiers before and after the complex training program in season. and to identify the characteristics of the athletes'
physical development. The subjects of this study are 8 national male alpine skiers who are registered with Korean Ski
Association, within ranking 10 and participating in the game. Isokinetic knee joint muscular strength employed Cybex HUMAC
NORM. in order to verify the difference of measurement of knee-joint isokinetics according to the training program, paired t-test
was performed and the level of significance for all the statistic analysis was set for a= .05. According to results, the following
conclusions were obtained. 1. The maximum muscular strength and maximum muscular strength per body weight of the knee joint
shows greater measurements after a season and maximum extensor muscular strength and %BW maximum extensor muscular
strength showed noticeable difference. (p<.05). 2. The average power of the extensor muscular strength of the knee joint in a
statistically significant difference(p<.01)(p<.05). 3. When the rate of total work of the knee joints were measured, there has a
statistically noticeable difference(p<05). When the muscular strength in the knee joints of the male national alpine skiers were
measured before and after the complex training program, our conclusion is that they showed statistically better results after the
training. This means that in order to improve the performance level of the skiers, it should be a priority to maintain and
develop the level of the physical strength at the beginning of the season until the end of the season.