Abstrak ___________________________________________________________________Sebagai atlet Nasional bola voli haruslah memiliki kekuatan otot tungkai yang baik sehingga tinggi lompatan dapat maksimal membentuk serangan dan pertahanan dalam permainan. Meningkatkan kekuatan otot tungkai dapat dilakukan dengan weight training salah satunya back dan front squat, sehingga dalam penelitian ini akan mencari jawaban mengenai 1) pengaruh latihan back squat dan front squat terhadap hasil vertical jump dan hasil lower body power index, 2) perbedaan pengaruh antara latihan back squat dan front squat terhadap hasil vertical jump dan lower body power index. Metode yang digunakan adalah metode eksperimen dengan memberikan weight training back squat kepada kelompok A dan front squat kepada kelompok B yang pembagian kelompoknya menggunakan metode ABBA berdasarkan hasil pre test vertical jump selama 16 kali pertemuan.Hasil penelitian berdasarkan analisis data diperoleh hasil kelompok A terhadap vertical jump sig(2-tailed) 0.058>0.05 yang berarti tidak memiliki pengaruh, dan hasil lower body power index yakni sig(2-tailed) 0.040<0.05 yang berarti terdapat pengaruh. Pada kelompok B hasil vertical jump dan lower body power index ialah sig(2-tailed) 0.001<0.05 dan 0.003<0.05 yang artinya terdapat pengaruh pada hasil keduanya.Dari hasil analisa data penelitian dapat disimpulkan kedua latihan beban tersebut dapat digunakan untuk meningkatkan hasil lompatan dan kekuatan otot tungkai untuk atlet bola voli. Abstract ________________________________________________________________As a national athlete volleyball should have good leg muscle strength so high jump can maximize form attacks and defenses in the game. Improving the leg muscle strength can be done with weight training one of them back and front squats, s ehingga in this study will seek answers to questions about 1) the effects of exercise back squat and front squat on the results of vertical jump and the result of lower body power index, 2) differences in effect between workout back squat and front squat against vertical jump results and lower body power index. The method used is an experimental method to give back squat weight training to group A and front squat to group Bthe division of the group using a method based on the pre-test ABBA vertical jump during 16 sessions. The results based on the result of group A against vertical jump sig (2-tailed) 0.058> 0.05, which means no effect, and the result of the lower body power index sig (2-tailed) 0.040 <0.05 which means there is influence. In group B vertical jump results and lower body power index is sig (2-tailed) 0.001> 0.05 and 0.003 <0.05 which means there is an influence on the results of both. From the results of the research data analysis can be concluded both weight training can be used to improve the leap and strength of leg muscles for volleyball athletes.
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