Reliability of metabolic and stroke-cycle responses during sub-maximal breaststroke swimming

K. G. Thompson, G. Atkinson, D. P.M. MacLaren, A. Lees

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    The purpose of the study was to investigate the reliability of metabolic, stroke rate and stroke count measurements using a novel pacing device: the Aquapacer™. Ten male swimmers with mean ± s age=21±4yrs; stature=177±7cm; body mass=74.9±6.9kg; sum of four skinfolds=31.9±9.2mm and 200m time trial time=171.5±17.6s, volunteered for the study. Subjects completed two 200m breaststroke swims, at 85% and 95% of the pace of a maximal 200m time trial. This protocol was repeated on two further occasions, 48 hours apart. All variables demonstrated no practically-important nor statistically significant systematic changes across trials (P>0.05). The 95% limits of agreement (LOA) indicated random measurement error of between 1.6% and 18.2% of mean values for most variables. Such error magnitudes were deemed acceptable for the Aquapacer™ to be used in research settings and sports science support work on individual athletes. Carbon dioxide expired and blood lactate concentration following the swims at 85% of 200TT demonstrated measurement error (LOA)>32 %, which would make the detection of meaningful changes in either research or for individuals difficult. The latter finding has implications for assessing fitness at sub-maximal speeds and the identification of the lactate threshold.

    Original languageEnglish
    Pages (from-to)35-54
    Number of pages20
    JournalJournal of Human Movement Studies
    Issue number1
    Publication statusPublished - 21 Jul 2004


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