Abstract:
To study the effect of loaded jump squat with different direction jump on muscular fitness. Forty five male subjects from student of faculty of Sports Science Chulalongkorn University were purposively sampled for this study. Then, they were divided in to three groups (15 persons per group) based on matching group method. The first experimental group performed loaded jump squat. The second experimental group performed loaded jump squat by jump over barrier. The third experimental group performed loaded jump squat by jump on stair. Training was six weeks and experimental subjects trained twice a week. Pre and post training measures included : leg muscular strength, leg muscular power, speed and agility. The obtained data were analyzed in terms of means, standard deviations, paired t-test and one way analysis of Variance. After initial analysis, Tukey A was also employed to determine significant different of group means at the .05 level. Research result after six weeks indicated that: 1. Leg muscular power (per kg. body weight) and speed in the loaded jump squat by jump on stair group was significantly better than loaded jump squat group and loaded jump squat by jump over barrier group at the .05 level. 2. There were no significant differences on leg muscular strength (per kg. body weight) and agility of all groups at the .05 level. In conclusion, loaded jump squat by jump on stair can improve muscular fitness better than jump by other directions.