Prior Knowledge of Trial Number Influences the Incidence of Plateau at VO2max

Gordon, Dan and Caddy, Oliver and Merzbach, Viviane and Gernigon, Marie and Baker, James and Scruton, Adrian and Keiller, Donald R. and Barnes, Richard (2015) Prior Knowledge of Trial Number Influences the Incidence of Plateau at VO2max. Journal of Sports Science & Medicine. (Draft)

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Abstract

The purpose of this study was to assess the VO2max plateau response at VO2max during a series of pre-determined trials. METHODS: Ten male well-trained athletes (age, 23.0 ± 3.2; height, 183.3 ± 5.5 cm; mass 77.5 ± 11.1 Kg; VO2max 66.5 ± 5.0 ml.kg-1,min-1), but who were VO2max testing naïve and with prior-knowledge of trial number completed four incremental tests to volitional exhaustion, separated by ~72-h for the determination of VO2max and gas exchange threshold. Throughout all trials VO2max was recorded on a breath-by-breath basis using a pre-calibrated metabolic cart, using a plateau criterion of Δ VO2 ≤1.5 ml.kg-1.min-1 over the final 2 consecutive 30 s sampling periods. A significant difference was observed between trial-1 and trial-4 for plateau incidence (p = 0.0285) rising from 20% in trial-1 to a 70% response rate in trial-4. Furthermore a significant difference was observed for VO2dif (difference be-tween criterion value and Δ VO2) in trial-1, 1.02 ± 1.69 ml.kg-1.min-1 (p = 0.038), with non-significant differences observed for all other trials, despite a non-significant difference for VO2max across all trials (p > 0.05). Finally, a significant difference was observed for effort perception (RPE) at volitional exhaustion between trial-1 (17.7 ± 1.3) and trial-4 (19.0 ± 1.4) (p = 0.0052). These data indicate that prior-knowledge of trial number can influence the manifestation of the VO2 plateau in a group of well-trained male athletes, thereby suggesting that a form of effort control is established in order to preserve the finite anaerobic capacity.

Item Type: Journal Article
Additional Information: Citation: Gordon, D., Caddy, O., Merzbach, V., Gernigon, M., Baker, J., Scruton, A., ... & Barnes, R. (2015). Prior Knowledge of Trial Number Influences the Incidence of Plateau at VO2max. Journal of sports science & medicine, 14(1), 47.
Faculty: Faculty of Science & Technology
Depositing User: Mr I Walker
Date Deposited: 01 Jun 2016 07:49
Last Modified: 07 Jul 2016 12:54
URI: http://arro.anglia.ac.uk/id/eprint/611337

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