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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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FIELD-BASED PRE-COOLING FOR ON-COURT TENNIS CONDITIONING TRAINING IN THE HEAT |
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Rob Duffield1  ,
Stephen P. Bird1,2 and Robert J. Ballard2,3 |
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1Exercise and Sports Science Laboratories, School of Human Movement Studies, Charles Sturt University, Bathurst NSW, Australia, 2Sports Science Division, Program Atlet Andalan, Menteri Negara Pemuda dan Olahraga, Jakarta Indonesia, 3Persatuan Tenis Seluruh Indonesia (Tennis Indonesia), Komplek Gelora Bung Karno, Jakarta Indonesia |
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© Journal of Sports Science and Medicine (2011) 10, 376 - 384 |
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| ABSTRACT | |||
| The present study investigated the effects of pre-cooling for
on- court, tennis-specific conditioning training in the heat. Eight highly-trained
tennis players performed two on-court conditioning sessions in 35oC, 55%
Relative Humidity. Sessions were randomised, involved either a pre-cooling
or control session, and consisted of 30-min of court- based, tennis movement
drills. Pre-cooling involved 20-min of an ice-vest and cold towels to the
head/neck and legs, followed by warm-up in a cold compression garment. On-court
movement distance was recorded by 1Hz Global Positioning Satellite (GPS)
devices, while core temperature, heart rate and perceptual exertion and
thermal stress were also recorded throughout the session. Additionally,
mass and lower-body peak power during repeated counter-movement jumps were
measured before and after each session. No significant performance differences
were evident between conditions, although a moderate-large effect (d = 0.7-1.0;
p > 0.05) was evident for total (2989 ± 256 v 2870 ± 159m) and high-intensity
(805 ± 340 v 629 ± 265m) distance covered following pre-cooling. Further,
no significant differences were evident between conditions for rise in core
temperature (1.9 ± 0.4 v 2. 2 ± 0.4oC; d > 0.9; p > 0.05), although
a significantly smaller change in mass (0.9 ± 0.3 v 1. 3 ± 0.3kg; p <
0.05) was present following pre-cooling. Perceived thermal stress and exertion
were significantly lower (d > 1.0; p < 0.05) during the cooling session.
Finally, lower-body peak power did not differ between conditions before
or after training (d < 0.3; p > 0.05). Conclusions: Despite trends
for lowered physiological load and increased distances covered following
cooling, the observed responses were not significantly different or as explicit
as previously reported laboratory-based pre-cooling research. Key words: Cooling, heat, training, GPS, racquet sports. |
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