抄録
The purpose of this study was to estimate swimming drag force during front crawl swimming based on a mass model and to discuss the validity of the estimation. The subject was a male swimmer (height : 1.74m, weight : 67.0kg, age : 23.2yrs, record of 50mFr. : 23.2sec). The trial was front crawl swimming without kicking in swimming flume, which was set the flowing velocity to 1.3m/s. The acceleration of the visual marker on swimmer's umbilicus instead of the center of gravity of whole body was calculated by movie analysis. The propulsive force by swimmer's hands was calculated by measured pressure distribution and attitude of hands. The swimming drag force was estimated by the difference of the inertial term and propulsive force. It was suggested that the estimated drag force would be acceptable compared with previous researches, although it would be needed to improve the methodology.
