The Methods of Uphill Sprint and Downhill Sprint Training Against 100 Meters Running Speed Viewed From the Strength of the Leg Muscles in son Athletes

The purpose of this study is to find the truth about: (1) To out difference in influence between Uphill sprint and Downhill Sprint training methods on improvement 100-meter achievement. (2) achievement students who have high low leg muscle strength. (3) determine effect interaction with strength muscles performance. Experimental method one group without comparison using pretest-posttest design. population was athletes from SMP Negeri 1 Rejoso, Nganjuk Regency, class VIII. sample size used 32 Men athletes. sampling technique Purposive random sampling. variables studied are free consisting two reactors, namely manipulative attributive dependent variable. Manipulative treatments, including giving exercises, sprints. While variable which distinguished by low. increase sprints 100 meters. Data collection techniques tests measurements, data back dynamometers. analysis for hypothesis testing 2-lane design Variance Analysis (ANOVA) Newman-Keuls range test, at a significance level 95%. results that has different training. From calculation obtained Fhit = 12.5641 greater than Ftabel 2.95 (F0 > Ft) signification 5%. This means null (Ho) rejected. practice improvements acceptable. showed players had evidenced value 4.2619 (H0) players, it also there an plyometric exercise significant strength, shown F0 23.4810 Ft 5% so H0 rejected, can be concluded Players more appropriately given treatment