Treffer: Modifikasi Latihan Plyometric Terhadap Lompat Tinggi Gaya Straddle Di Sltp

This research has been conducted in order to see the correlation of modification of plyometric practice with the study results of straddle high jump by the third grade students of junior high school 2 Pontianak.The population of this research are all the third grade students of junior high school 2 Pontianak which are 245 students. The sample that have been used in this research are 35 students with purposive sampling. The method that has been used in this research is pre-experimental design.Data analysis are conducted with computerization system and also with t analysis. The analysis results by mc.exel computerization has gained 20,11 of t test with dB=(N-1) is 35-1=34 and when 5% significance, t table value is 2,034 with the increment of percentage is 39,06%. According to the t test result, it can be concluded that there is a correlation between the modification of plyometric practice and the result of straddle high jump.