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Proceedings 2018, 2(6), 287; https://doi.org/10.3390/proceedings2060287

Comparison of Active Drag Using the MRT-Method and the MAD-System in Front Crawl Swimming

1
Doctoral Program in Physical Education, Health and Sport Sciences, University of Tsukuba, Tsukuba 305-8574, Japan
2
Department of Sports and Life Sciences, National Institute of Fitness and Sports in Kanoya, Kanoya 891-2393, Japan
3
Department of Systems and Control Engineering, Tokyo Institute of Technology, Tokyo 152-8550, Japan
4
Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba 305-8574, Japan
Presented at the 12th Conference of the International Sports Engineering Association, Brisbane, Queensland, Australia, 26–29 March 2018.
*
Author to whom correspondence should be addressed.
Published: 11 February 2018
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Abstract

The purpose of this study was to compare the active drag values estimated by the MRT-method and the MAD-system. Six male competitive swimmers participated in this study and performed front crawl with arms only condition. The drag was compared at six-staged velocities ranged from 0.9 to 1.4 m/s between MRT-method and MAD-system. The drag estimated by MRT-method showed larger values than that obtained using MAD-system at each velocity (MRT-method/MAD-system: 119% at 1.0 m/s; 133% at 1.2 m/s; 147% at 1.4 m/s). In addition, the stroke length in MRT-method condition decreased with swimming velocity being increased, while that in MAD-system condition was constant. Therefore, swimmers had to increase their stroke frequency in MRT-method condition in order to achieve the same swimming velocities as MAD-system condition, especially at high velocities. It was concluded that the difference in the way of exerting propulsion between MAD-system and MRT-method influenced the active drag which were estimated in two methods.
Keywords: active drag; front crawl; stroke frequency; stroke length; propulsion active drag; front crawl; stroke frequency; stroke length; propulsion
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Narita, K.; Ogita, F.; Nakashima, M.; Takagi, H. Comparison of Active Drag Using the MRT-Method and the MAD-System in Front Crawl Swimming. Proceedings 2018, 2, 287.

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