This study compared the effects of two different resistance training programs based on different types of periodization. The programs consisted of two types of periodization: one is the so called linear periodization (LP) in which the intensity of training increased linearly, and the other is the undulating periodization (UP) in which the training intensity is undulated every week. The training period was 9 weeks. Thirteen male college tennis players were assigned to either the LP (n=7) or UP (n=6) training group. The LP group performed resistance training three times a week using loads of 10 repetitions maximum (10RM) for 3 weeks, followed by 6RM for 3 weeks, and 3RM for 3 weeks. The UP group performed 10RM on Tuesday, 6RM on Thursday, and 3RM on Saturday each week. Testing was performed before training and after training. The dynamic maximal strength was evaluated by 1 repetition maximum (1RM) with bench press and leg press weight lifts. Isometric back muscle strength, vertical jump, anthropometric test and subjective feeling test were also administered. 1RM bench press improved significantly in both groups. However, muscle strength and body composition showed no significant differences by groups. On the other hand, vertical jump performance improved in UP but not in LP. From these results, it was suggested that the UP type of periodization is more recommendable.
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