HYDRODYNAMIC RE-EXAMINATION OF UNDERWATER NON-PROPULSIVE PHASE IN FRONT CRAWL

Authors

Daiki Koga, University of TsukubaFollow
Kenta Homoto, Univesity of TsukubaFollow
Takaaki Tsunokawa, University of TsukubaFollow
Hideki Takagi, Univesity of TsukubaFollow

Category

Water Sports

Document Type

Paper

Abstract

The purpose of this study was to re-examination of the hand propulsive force (F_P) during the entry and catch (EC) phase in a stroke of front crawl. The EC phase was defined as non-propulsive phase (Collet et al., 2000), which is until a hand starts moving backwards after it enters the water and moves forward. The other phases in the stroke was defined as propulsive phase. Twelve male swimmers performed a 20-m front crawl with maximal effort. For estimatinng the F_P, six pressure sensors were attched on their right hand and trials were recorded by three-dimentional motion capture system. We calculated %EC that was the ratio of the mean F_P in the EC phase to the mean F_P in the propulsive phase. As a result, the mean F_P in the EC phase was 22.4 ± 12.9 N and the %EC was 29.1%. Therefore, it was considered the EC phase is propulsive phase even though the hand moves forward.

Recommended Citation

Koga, Daiki; Homoto, Kenta; Tsunokawa, Takaaki; and Takagi, Hideki (2020) "HYDRODYNAMIC RE-EXAMINATION OF UNDERWATER NON-PROPULSIVE PHASE IN FRONT CRAWL," ISBS Proceedings Archive: Vol. 38: Iss. 1, Article 80.
Available at: https://commons.nmu.edu/isbs/vol38/iss1/80