Reproducibility of the maximum accumulated oxygen deficit and run time to exhaustion during short-distance running
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CONTRIBUTORS:
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JOURNAL:
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YEAR:
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2000
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PUB TYPE:
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Journal Article
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SUBJECT(S):
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ANAEROBIC-CAPACITY; TEST-RELIABILITY; FATIGUE; RUNNING; MAN; YOUNG-ADULT
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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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103-366-721
(Last edited on
2002/02/27 18:44:58 US/Mountain)
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SPONSOR(S):
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ABSTRACT:
The aim of this study was to determine the reproducibility of the maximal accumulated oxygen deficit and the associated exercise time to exhaustion during short-distance running. Fifteen well-trained males (mean +/- s: VO2max = 58.0 +/- 4.6 ml.kg-1.min-1) performed the maximum accumulated oxygen deficit test at an exercise intensity equivalent to 125 % VO2max. The test was repeated at the same time of day on three occasions within 3 weeks. There was no significant systematic bias between trials for either maximum accumulated oxygen deficit (mean +/- s: trial 1 = 69.0 +/- 13.1; trial 2 = 71.4 +/- 12.5; trial 3 = 70.4 +/- 15.0 ml O2 Eq.kg-1; ANOVA, F = 0.70, P = 0.51) or exercise time to exhaustion (trial 1 = 194 +/- 31.1; trial 2 = 198 +/- 33.2; trial 3 = 201 +/- 36.8 s; F = 1.49, P = 0.24). In addition, other traditional measures of reliability were also favourable. These included intraclass correlation coefficients of 0.91 and 0.87, and sample coefficients of variation of 6.8 % and 5.0 %, for maximum accumulated oxygen deficit and exercise time to exhaustion respectively. However, the '95 % limits of agreement' were 0 +/- 15.1 ml O2 Eq (1.01 X/divided by 1.26 as a ratio) and 0 +/- 33.5 s (1.0 X/divided by 1.18 as a ratio) for maximum accumulated oxygen deficit and exercise time to exhaustion respectively. We estimate that the sample sizes required to detect a 10 % change in exercise time to exhausting and maximum accumulated oxygen deficit after a repeated measures experiment are 10 and 20 respectively. Unlike the results of previous maximum accumulated oxygen deficit studies, we conclude that it is not a reliable measure.
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