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Pengaruh Lalihan Phomeirik Modifikasi terhadap Power Otot Tungkai pada Olahraga Boiavoti

P E N G A R U H L A T I H A N P L I O M E T R I K M O D I F I K A S I T E R H A D A P P O W E R O T O T T U N G K A I P A D A O L A H R A G A

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Fauzi j , ^ c , - r i i : ' ^ F I K Universitas Negeri Yogyakarta

Abstract Plyometrics is about a form o f burst-of-power training wi th

characteristic usage o f very strong and quick muscle contractions and also represents isometric, eccentric, and isotonic training combinations. The training o f plyometrics is with knee-tuck j u m p modification and o f side-front-back jump combination models. A research this article is about is aimed at proving that both practice models above can improve leg power and that plyometric practice is able to have great influences on leg power improvement.

The population o f the research study consists o f male-athlete students o f the volleyball school o f the Sport Science Faculty. State Universit\ o f Yogyakarta. The sample used consisted o f 48 students/athletes selected wi th an intake technique by means o f purposive sampling. The trainees were divided into similar three groups: the first group was treated wi th the knee-tuck j u m p modification, the second group was treated wi th side-front-back j u m p combination, and the third group was given no specific treatment to function as a control group. Before and after the treatments, a vertical j u m p test was administered. A normality test on the data showed that the data distribution was normal and a homogeneity test on the three groups showed that they were homogeneous. From an Anova test on two treatments w i t h a control group, significant differ^^nces were found.

The results o f data analysis indicate that plyometric knee-tuck j u m p modification and side-froni-back jump combination training by means o f the program for the research study is proven to have influences on the increase o f leg muscle power o f students/athletes

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