The Effect of Plyometric Exercise Combination on Leg Muscle Strength Reviewed from Body Mass Index at Pjkr Volleyball Club at Artha Wacana Christian University Kupang

Abstract

The purpose of this study was to examine the effect of a combination of plyometric exercises on leg muscle strength, reviewed from (BMI) at the Volleyball Club (PJKR) at UKAW. This study used a quantitative method with a descriptive pretest-posttest experimental approach. The population of this study consisted of 54 students who joined the PJKR volleyball club at Artha Wacana Christian University, Kupang. Of the 54 populations, only 30 samples met the research criteria. The selected sample was from PJKR students who joined the PJKR Volleyball Club at Artha Wacana Christian University, Kupang. The results of this study indicate that the box jump and depth jump training methods in the normal BMI category that are more effective are the depth jump training method with an N-gain value or average of 0.3920 while the box jump N-gain value or average is 0.2034 and the sig value of the depth jump and thin BMI is sig 0.000 <0.05 and the box jump and thin BMI group is sig 0.007 <0.05, while the box jump and depth jump training in the normal BMI category is more effective than the depth jump training method with an N-gain value or average of 0.4387, while the box jump has an N-gain value or average of 0.3581, with a sig depth jump value of sig 0.000 <0.05 and the box jump sig value of 0.001 <0.05, and the box jump and depth jump training method in the obese BMI category is more effective than the box jump with an N-gain value or average of 0.3559 while depth jump with N-gain value or average of 0.3065, with sig box jump value of 0.001 <0.05 while depth jump 0.000 <0.05. Based on the results of this study it can be concluded that plyometric training must be adjusted to individual attributes, especially those related to BMI.