Investigating Kinetics in the Freestyle Flip Turn Push-Off

in Journal of Applied Biomechanics

Click name to view affiliation

Andrew D. Lyttle
Search for other papers by Andrew D. Lyttle in
Current site
Google Scholar
PubMed
Close
,
Brian A. Blanksby
Search for other papers by Brian A. Blanksby in
Current site
Google Scholar
PubMed
Close
,
Bruce C. Elliott
Search for other papers by Bruce C. Elliott in
Current site
Google Scholar
PubMed
Close
, and
David G. Lloyd
Search for other papers by David G. Lloyd in
Current site
Google Scholar
PubMed
Close
Restricted access

Thirty experienced male swimmers with body types ± 1 SD of the mean of selected body form parameters reported for elite male swimmers were recruited for the study. During three freestyle flip turns, selected kinetic, hydrodynamic, and kinematic variables of the push-off following a flip turn were recorded. Kinetics were recorded via a 2D vertically mounted forceplate that recorded peak push-off force and total impulse. The acceleration of each swimmer’s center of gravity and wall exit velocity were calculated from underwater videography. Hydrodynamic peak drag force and drag impulse were calculated from the kinetic and kinematic data using a derivative of Newton’s second law. A stepwise regression yielded peak drag force, peak propulsive force, and push-off time in the final regression equation (R = 0.80; R2 = 0.64). Beta values indicated that the peak drag force carried the highest weighting of the three variables. The results of the stepwise regression indicated that a combination of a low peak drag force high peak propulsive force, and increased wall push-off time produced the fastest final push-off velocity.

The authors are with the Department of Human Movement and Exercise Science at The University of Western Australia, Nedlands WA 6907, Australia.

  • Collapse
  • Expand
All Time Past Year Past 30 Days
Abstract Views 1673 640 131
Full Text Views 60 6 1
PDF Downloads 61 3 0