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Original Articles

Relative Endurance and Physiological Responses: A Study of Individual Differences in Prepubescent Boys and Adult Men

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Pages 246-255 | Accepted 11 Feb 1981, Published online: 08 Feb 2013
 

Abstract

The reliability of individual differences in relative endurance performance and physiological response was studied in prepubescent boys (N = 21) and adult men (N = 21). Subjects were tested twice (test and retest) on a relative endurance test consisting of pedalling a bicycle ergometer for 8 minutes duration at a high initial work-rate. The work-rate averaged 103% ± 1.0% VO2 max (mean ± S.E.) for the children and 105% ± 1.1% VO2 max for the adults, p > .05. Except for minute 3, children and adults had similar patterns for consistency of relative endurance performance (RPM). However, in comparison to adults, children had smaller individual difference variation for both VO2 and HR (p > .05). On the average, children had a greater proportion of total variability in VO2 (34% vs. 17%) and HR (49% vs. 13%) due to intra-individual variability in comparison to true individual differences. Children-adult differences were attributed to maturity differences.

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