HUBUNGAN STRUKTUR PEDIS DENGAN KECEPATAN LARI 60 METER PADA SISWA SMA NEGERI 3 SEMARANG

Abstract

Background: Indonesia has quite a number of athletes competing in elite runners category in the past. Unfortunately, nowadays these achievements has been difficult to be obtained by our Indonesian athletes. Various studies has been conducted to determine the maximum effort needed in order to achieve optimal results in running. One of the supporting elements that supported the optimalization of running speed is the anatomical structure of the foot such as arcus pedis and pedis length that helped maximize the efficiency of foot function. Pedis structure consists of two functions, for weight bearing and for walking or running movement. Several previous studies proved that arcus pedis has a negative correlation with running speed. Aim: To determine the relationship between the research subjects’ pedis structure (arcus pedis and pedis length index) and their running speed. Methods: This research was using a cross sectional study approach and the subjects were 61 male students grade X SMAN 3 Semarang State High School. Methods used to assess the arcus pedis index was Staheli-footprint methods. Pedis length was assessed using a set of triangle ruler. Running speed was measured using a stopwatch with a distance of 60 meters. Results: It was found the mean of the right and left arcus pedis index data were 0.85 ± 0.27;the mean of the relative pedis length data were 0.111 ± 0.003; and the mean of the running speed data were 0.46 ± 5.71 m / s. The Spearman correlation test between arcus pedis and running speed on 60 meters track showed non-significant negative correlation (r = -0.150; p = 0.247). On the other hand, Spearman correlation test between pedis length and running speed indicates non-significant positive correlation (r = 0.014; p = 0.914). Conclusion: There is a non-significant negative correlation between arcus pedis and the running speed on 60 meters track. There is a non-significant positive correlation between pedis and the running speed on 60 meters track. Keywords: Arcus pedis, pedis length, escape velocity