Measurement of Repeated Jumps Using WiMAS, and Application for Field Test

• Published in: Journal of Japan Society of Sports Industry Vol. 20; no. 1; pp. 19 - 28
• Main Authors: TAHARA, Ryoji, SHIMONAGATA, Shuji, TAGUCHI, Masahiro, MORIMOTO, Shigeru
• Format: Journal Article
• Language: English
• Published: Japan Society of Sports Industry 2010
• Subjects: BOSCO′S TEST; Field Test; Muscle Endurance Test; Repeated Jump; WiMAS
• ISSN: 1343-0688; 1884-2534; 1884-2534
• DOI: 10.5997/sposun.20.19

The purpose of this study was to examine the measurement accuracy of jump height by using WiMAS in repeated jumps. In addition, the measurement data of repeated jumps were applied to a muscle endurance test. WiMAS is a measurement unit recorded by an accelerometer of MEMS type and a transmitter. Twenty university students wore a WiMAS recording device on the hip and measured single movement jumps and repeated squat jumps at the rate of 60 times per minute on a force platform. The correlations of the measured jump height in single movement jumps and repeated squat jumps were calculated. Moved distance during repeated jumps were filmed with a digital video camera and calculated by using the two dimensional DLT method. Muscle endurance of legs was evaluated by applying jump height data by WiMAS and force platform to BOSCO′S TEST. The errors of the jump height which were measured by using WiMAS and force platform were small. There were high correlations between the data of WiMAS and the data of force platform in single movement jumps, repeated squat jumps and results of BOSCO′S TEST. During repeated jumps, the moved distance to longitudinal direction was 0.73±0.15 (m) and horizontal direction was 0.35±0.07 (m) .