A practical application of the real-time evaluation system for the swimming techniques

本文通过人体模型实验和游泳运动员实验两个实验，试图建立一种实时推测人在游泳过程中手部所受水动力的方法。（l）掌指关节上的八个压力传感器计算的代表性压力值之间存在显著相关性，（II、III、IV和V）和通过人体模型实验在整个手上产生的流体动力。因此，我们确认了根据八个点的压力值计算水动力的方法的有效性。(2)通过将垂直于手作用的代表压力值Pv代入以下公式并乘以手的平面面积S来获得流体动力。Fv = S ×（1.339 x Pv-116.150）。(3)我们的结论是，这种新的方法是如此正确和有用的传统方法相比，快速反馈给游泳运动员成为可能。在进一步的研究中，我们将利用此方法测量不同级别、不同项目的水动力，并建立数据库，供教练员和游泳运动员参考。利用此数据库，我们希望开发一个软件，即使在没有优秀教练员的情况下，也能对击球技术进行定性评价。

We tried to establish the methodology which presumed the hydrodynamic force demonstrated by human hands during swimming in real-time by means of the following two experiments, a human model experiment and an experiment using actual swimmers.Here are summery of results in the two experiments ; (l) There was a significant correlation between the representative pressure value computed from the eight pressure sensors on the metacarpophalangeal joints (II, III, IV and V) and the hydrodynamic force generated on the entire hand by the human model experiment. We confirmed, therefore, the validity of the methodology which presumed the hydrodynamic force computed from the eight points' pressure values. (2) The hydrodynamic force was obtained by substituting the representation pressure value Pv, which acts perpendicularly to the hand, for the following formula and multiplying by the hand's plane area S. Fv = S × (1.339 x Pv-116.150). (3) We concluded that this new methodology was so correct and useful comparing to the conventional method that the quick feed back to swimmers became possible. In further study, we will measure the hydrodynamic force by this method in various levels and events, and make a database for coaches and swimmers. By using the database, we would like to develop a software which can evaluate the stroke technique qualitatively even if there is no excellent coaches.