Passive and active floating torque during swimming

European Journal of Applied Physiology
Per-Ludvik KjendlieJames Stray-Gundersen

Abstract

The purpose of this study was to examine the effect of passive underwater torque on active body angle with the horizontal during front crawl swimming and to assess the effect of body size on passive torque and active body angle. Additionally, the effects of passive torque, body angle and hydrostatic lift on maximal sprinting performance were addressed. Ten boys [aged 11.7 (0.8) years] and 12 male adult [aged 21.4 (3.7) years] swimmers volunteered to participate. Their body angle with the horizontal was measured at maximal velocity, and at two submaximal velocities using an underwater video camera system. Passive torque and hydrostatic lift were measured during an underwater weighing procedure, and the center of mass and center of volume were determined. The results showed that passive torque correlated significantly with the body angle at a velocity 63% of v(max) ( alpha(63) r=-0.57), and that size-normalized passive torque correlated significantly with the alpha(63) and alpha(77) (77% of v(max)) with r=-0.59 and r=-0.54 respectively. Hydrostatic lift correlated with alpha(63) with r=-0.45. The negative correlation coefficients are suggested to be due to the adults having learned to overcome passive torque when swimming at subm...Continue Reading

Citations

Feb 19, 2009·European Journal of Applied Physiology·P ZamparoC Capelli
Apr 30, 2010·European Journal of Applied Physiology·P ZamparoD Pendergast
Jun 16, 2010·Journal of Biomechanics·Cecilie CaspersenPer-Ludvik Kjendlie
Sep 11, 2013·Journal of Sports Sciences·Vassilios GourgoulisGeorgios Mavromatis
Oct 5, 2012·Perceptual and Motor Skills·Fabrício MadureiraAndrea Michele Freudenheim
Jan 11, 2007·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Argyris G ToubekisSavvas P Tokmakidis
Mar 1, 2008·Journal of Applied Biomechanics·Per-Ludvik Kjendlie, Robert Keig Stallman
May 26, 2010·Journal of Applied Biomechanics·Hugues LeblancDidier Chollet
Dec 10, 2020·Scientific Reports·Naoki YoshidaMasahiro Kohzuki

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