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

我们通过人体模型实验和实际游泳者实验，试图建立实时推测游泳过程中人手所表现的水动力的方法。下面是两个实验结果的总结；(l) 8个掌指关节（II、III、IV、V）压力传感器计算的代表性压力值与人体模型实验对全手产生的水动力有显著相关性。因此，我们证实了该方法的有效性，该方法假定从八个点的压力值计算水动力。(2)将下式中垂直于手的压力表示值Pv，乘以手的平面面积S，得到水动力Fv = S × （1.339 × Pv-116.150）。我们的结论是，与传统方法相比，这种新方法是如此正确和有用，以至于向游泳者提供快速反馈成为可能。在进一步的研究中，我们将用这种方法测量不同级别和项目的水动力，并建立一个数据库供教练和游泳运动员使用。利用该数据库，开发一个在没有优秀教练的情况下也能对游泳技术进行定性评价的软件。

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.