Neuromuscular, metabolic and hormonal profiles of young tennis players and untrained boys
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CONTRIBUTORS:
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JOURNAL:
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YEAR:
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1989
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PUB TYPE:
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Journal Article
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SUBJECT(S):
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TENNIS; BOY; ADOLESCENT; PUBERTY; NEUROMUSCULAR-SYSTEM; HORMONE; METABOLISM
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DISCIPLINE:
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No discipline assigned
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HTTP:
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LANGUAGE:
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English
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PUB ID:
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103-366-277
(Last edited on
2002/02/27 18:45:02 US/Mountain)
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SPONSOR(S):
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ABSTRACT:
This study compared the neuromuscular, metabolic and hormonal profiles of trained prepubescent tennis players and an untrained group. The boys in the experimental group (n=9; mean age plus/minus S.D.=11.4 plus/minus 0.5 years) had participated in tennis training for 2.3 plus/minus 1.0 years and the boys in the control group (n=9; mean age plus/minus S.D. =10.9 plus/minus 0.4 years) were normal active volunteers. The tennis players were found to be physically more active than the controls when the comparison was made for either 1 year (4.9 plus/minus 1.8 vs 2.6 plus/minus 2.5 times per week; P<0.05) or for 1 week (3.4 plus/minus 1.2 vs 0.4 plus/minus 0.5 times; P<0.001) preceding the tests. Choice reaction time was significantly (P<0.01) shorter in the experimental group (258 plus/minus 16 ms) than in the control group (344 plus/minus 81 ms). Dropping height in the best drop jump was significantly (P<0.05) higher in the tennis players (0.46 plus/minus 0.19 m) than in the control boys (0.27 plus/minus 0.10 m). The tennis players had significantly lower oxygen consumption at the 'anaerobic threshold' than the controls (P<0.05). There were no significant differences between the groups in serum hormone levels. The small differences that existed may have been caused by active participation in sport by the tennis players.
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