Racing start safety: head depth and head speed during competitive swim starts into a water depth of 2.29m

Cornett, Andrew C. and White, Josh C. and Wright, Brian V. and Willmott, Alexander P. and Stager, Joel M. (2011) Racing start safety: head depth and head speed during competitive swim starts into a water depth of 2.29m. International Journal of Aquatic Research and Education, 5 (1). pp. 14-33. ISSN 1932-9997

Documents
04Cornett_2011_0018.pdf
[img]
[Download]
58035554.pdf
[img]
[Download]
Request a copy
[img]
Preview
PDF
04Cornett_2011_0018.pdf - Whole Document

330Kb
[img] PDF
58035554.pdf - Whole Document
Restricted to Repository staff only

209Kb

Abstract

The head depths and head speeds of swimmers attained following the execution of racing starts during competition have not been well described. To address this, 211 competitive starts were filmed into a starting depth of 2.29 m with a block height of 0.76 m. Starts were stratified according to age, sex, stroke, and swim meet. Dependent measures were maximum depth of the center of the head, head speed at maximum head depth, and distance from the wall at maximum head depth. Significant main effects existed for age for all three measures: F(1, 106) = 13.33, p
< .001, F(1, 106) = 18.60, p < .001 and F(1, 106) = 70.59, p < .001, respectively. There was a significant age by sex interaction, F(1, 106) = 5.36, p = 0.023, for head speed. In conclusion, older swimmers performed starts that were deeper and faster than younger swimmers and nearly all starts exceeded the threshold speeds for injury. As compared to starts previously reported into 1.22 m, starts
were deeper, slower, and farther from the starting wall at maximum head depth.

Item Type:Article
Additional Information:The head depths and head speeds of swimmers attained following the execution of racing starts during competition have not been well described. To address this, 211 competitive starts were filmed into a starting depth of 2.29 m with a block height of 0.76 m. Starts were stratified according to age, sex, stroke, and swim meet. Dependent measures were maximum depth of the center of the head, head speed at maximum head depth, and distance from the wall at maximum head depth. Significant main effects existed for age for all three measures: F(1, 106) = 13.33, p < .001, F(1, 106) = 18.60, p < .001 and F(1, 106) = 70.59, p < .001, respectively. There was a significant age by sex interaction, F(1, 106) = 5.36, p = 0.023, for head speed. In conclusion, older swimmers performed starts that were deeper and faster than younger swimmers and nearly all starts exceeded the threshold speeds for injury. As compared to starts previously reported into 1.22 m, starts were deeper, slower, and farther from the starting wall at maximum head depth.
Keywords:Swim start, diving, head depth, safety
Subjects:C Biological Sciences > C600 Sports Science
B Subjects allied to Medicine > B830 Biomechanics, Biomaterials and Prosthetics (non-clinical)
Divisions:College of Social Science > School of Sport and Exercise Science
ID Code:3875
Deposited By: Sandy Willmott
Deposited On:19 Jan 2011 11:20
Last Modified:05 Dec 2013 10:22

Repository Staff Only: item control page