The Strength of Leg Muscle Against 100m Sprint Result on the Male Students at Class VIII-2 of SMPN 1 Rambah, Rokan Hulu Regency

Abstract

The problems found on the male students at class VIII-2 of SMPN 1 Rambah, Rokan Hulu Regency is that the result of sprint achieved by students are still less than optimal. It occurs because the students do not have good running techniques, such as swinging hands with less harmonious leg movements. In addition, the coordination of students' running movements are also not optimal. It can be seen when they run. The coordination between hands and legs swing still look stiff and make the result of students' running speed decrease. The students' running speed is also not optimal. It can be seen from the students' leg muscle powers. Thus, to create maximum running speed result, students should practice techniques, speed and strength of the leg muscles. This study aim to determine the contribution of leg muscle strength on the result of the 100m sprint on the students at class VIII-2 of SMPN 1 Rambah, Rokan Hulu Regency. The type of this study was correlational. The population in this study was all male students at class VIII-2 of SMPN 1 Rambah, Rokan Hulu Regency, with a total population of 14 male students. The sampling technique is a total sampling or taking the entire population of male students at class VIII-2 of SMPN 1 Rambah, Rokan Hulu Regency, consisting 14 students. The instrument used in this study was to measure the strength of leg muscle by using a leg dynamometer test and 100m running test to measure students' running. From the result of data processing, it was obtained rxy 0.512> 0.497 r table. With the contribution of KD equal to 25.36%, it can be concluded that there is a contribution of leg muscle strength on the 100m sprint result on the male students at class VIII-2, SMPN 1 Rambah, Rokan Hulu Regency.