The Effect of Combination of Plyometric Exercises on Normal Smash Skills in the Review of Leg Muscle Strength

The aim of this study to find out the effect of the combination of plyometric exercises on normal smash skills in terms of leg muscle strength. The method in this study using the experimental method uses a 2 x 2 factorial design. This method is validation, namely testing the effect of one or more variables on other variables. The number of samples in this study were 60 people divided into 2 groups by ordinal pairing and each got 20 athletes with high limbs, 20 athletes with low muscles and 20 athletes without treatment. And the jump height was measured in each group before and after being given the plyometric depth jump exercise treatment. Based on the results of the study, it shows the effect of a combination of plyometric exercises on normal smash skills in terms of leg muscle strength. The average jump height in the group (Pylometric jump and high jump Depth) increased from 52.20 to 61.60 in the A1B1 group, in the A2B1 group from 155.85 to 170.25. While the average jump height in (Pylometric jump and low depth jump groups) also increased from 32.50 to 45.00 in the A1B2 group, in the A2B2 group it also increased from 113.05 to 131.64. The results of the effect test in the treatment group and the control group showed a significant value (P < 0.005). The results of the different effect test showed that there was a different effect between the treatment group and the control group in increasing jumps. There is a significant effect between Plyometric exercises (box jumps and depth jumps) and leg muscle strength (high and low) on the increase in leg muscles in athletes. The results showed that the box jump training method was a more effective method used for athletes who had low leg muscle strength and depth jump training was used for athletes who had high leg muscle strength.