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ASSESSMENT OF SHORT-DISTANCE BREASTSTROKE SWIMMING PERFORMANCE WITH
CRITICAL VELOCITY
|
Daijiro
Abe1 ,
Hiroaki Tokumaru1, Shigemitsu Niihata2, Satoshi Muraki3, Yoshiyuki
Fukuoka4, Sachio Usui5 and Takayoshi Yoshida6 |
1Faculty of Integrated Cultures and Humanities, University of East Asia,
Shimonoseki, Yamaguchi, Japan
2Faculty of Welfare and Health, Fukuyama Heisei University, Fukuyama, Hiroshima,
Japan
3Department of Human Living System Design, Faculty of Design, Kyushu University,
Fukuoka, Japan
4Faculty of Environmental and Symbiotic Sciences, Prefectural University
of Kumamoto, Kumamoto, Japan
5Faculty of Integrated Arts and Sciences, Hiroshima University, Higashihiroshima,
Hiroshima, Japan
6Faculty of Health and Sport Sciences, Osaka University, Toyonaka, Osaka,
Japan
| Received |
|
14 April 2005 |
| Accepted |
|
18
May 2006 |
| Published |
|
01
June 2006 |
©
Journal of Sports Science and Medicine (2006) 5, 340
- 348
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| ABSTRACT |
| For high-velocity running or swimming, the relationship between
velocity (v) and its sustainable duration (t) can be described by
a hyperbolic relationship: (v - Vcrit)t = D', where
Vcrit is termed critical velocity, and D' is defined as
a curvature constant of the hyperbolic curve. The purposes of this
study were to examine whether the Vcrit could be applied
to evaluate short-distance breaststroke swimming performance and to
evaluate the relative contribution of D' in short-distance swimming
performance. Eleven male swimmers performed a series of time trials
corresponding to 75, 100, and 150-m in an indoor 50-m swimming pool.
The observed records were calculated into average velocities of each
event to determine Vcrit and D'. After the determination
of Vcrit and D', all subjects performed 50-m time trial
on another day. A maximal anaerobic power test using cycle ergometer
was also performed in the laboratory. The average velocity of the
50-m time trial significantly correlated with the obtained Vcrit,
but not with D'. D' was significantly correlated with the residual
error, calculated from the regression analysis for the relationship
between Vcrit and the average velocities of 50-m time trial.
A cluster analysis showed that most of the subjects were classified
as Vcrit dependency when performing 50-m time trial. Those
results indicated that Vcrit could be applied to evaluate
short-distance swimming performance, and it determined around 80%
of the short-distance breaststroke swimming performance.
KEY
WORDS: Critical swimming velocity, D', hyperbolic curve, cluster
analysis.
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