A comparison between active drag in front-crawl and passive drag on the body with a streamlined position at various velocities

(Ein Vergleich zwischen aktivem Vortrieb im Kraulschwimmen und passivem Vortrieb am Körper mit stromlinienförmiger Position bei unterschiedlichen Geschwindigkeiten)

The purpose of this study was to compare active drag during front-crawl swimming performed by competitive swimmers with passive drag acting on the same group of swimmers with a streamlined position at various velocities. Seven male competitive swimmers participated in this study, and the testing was conducted in a swimming flume. Active drag was evaluated for front-crawl swimming with upper and lower limb motion using a methodology that estimates the drag in swimming using measured residual thrust values (MRT method). Passive drag was measured by a load cell connected to the swimmers with a streamlined position using a stainless-steel wire. In each case, drag was estimated at six staged velocities ranging from 1.0 to 1.5 m/s. To compare the drags at various velocities, we calculated coefficients a and b by applying the measured force value at each velocity to the equation D = a vb (D: drag, v: velocity). The active drag estimated from the MRT method (a = 35.7 ± 5.3, b = 2.80 ± 0.22) was larger than passive drag (a = 23.6 ± 3.1, b = 2.08 ± 0.23). Furthermore, the difference between active and passive drag was large at high velocities. Therefore, it is possible that the effects of factors other than posture and/or body shape have a large influence on active drag, especially at high velocity.
© Copyright 2018 Japan Journal of Physical Education, Health and Sport Sciences. Japan Society of Physical Education, Health and Sport Sciences. Alle Rechte vorbehalten.

Schlagworte: Schwimmen Kraulschwimmen Technik Geschwindigkeit Vortrieb Biomechanik
Notationen: Ausdauersportarten Naturwissenschaften und Technik
DOI: 10.5432/jjpehss.17051
Veröffentlicht in: Japan Journal of Physical Education, Health and Sport Sciences
Veröffentlicht: 2018
Heft: 17051
Seiten: 1-11
Dokumentenarten: Artikel
Sprache: Englisch
Level: hoch