Improvement of Oxygen-Uptake Kinetics and Cycling Performance With Combined Prior Exercise and Fast Start

Kirsty Brock; Prokopios Antonellis; Matthew I. Black; Fred J. DiMenna; Anni Vanhatalo; Andrew M. Jones; Stephen J. Bailey

doi:10.1123/ijspp.2016-0557

Improvement of Oxygen-Uptake Kinetics and Cycling Performance With Combined Prior Exercise and Fast Start

in International Journal of Sports Physiology and Performance

Kirsty Brock, Prokopios Antonellis, Matthew I. Black, Fred J. DiMenna, Anni Vanhatalo, Andrew M. Jones, and Stephen J. Bailey

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DOI:: https://doi.org/10.1123/ijspp.2016-0557

Keywords:: pulmonary V˙O2; warm-up exercise; fast/all-out start; near-infrared spectroscopy; exercise performance

In Print:: Volume 13: Issue 3

Pages:: 305–312

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Purpose: To investigate whether oxygen-uptake ( $\dot{V} O_{2}$ ) kinetics and simulated 4-km cycling performance are synergistically improved by prior “priming” exercise and an all-out starting strategy. Methods: Nine men completed 4 target work trials (114 ± 17 kJ) to assess $\dot{V} O_{2}$ kinetics and cycling performance in a repeated-measures, crossover experimental design. Trials were initiated with either a 12-s all-out start or a self-selected start and preceded by prior severe-intensity (70%Δ) priming exercise or no priming exercise. Results: The $\dot{V} O_{2}$ mean response time (MRT) was lower (indicative of faster $\dot{V} O_{2}$ kinetics) in the all-out primed condition (20 ± 6 s) than in the all-out unprimed (23 ± 6 s), self-paced-unprimed (42 ± 13 s), and self-paced-primed (42 ± 11 s) trials (P < .05), with the $\dot{V} O_{2}$ MRT also lower in the all-out unprimed than the self-paced unprimed and self-paced primed trials (P < .05). Trial-completion time was shorter (performance was enhanced) in the all-out primed trial (402 ± 14 s) than in the all-out unprimed (408 ± 14 s), self-paced unprimed (411 ± 16 s), and self-paced primed (411 ± 19 s) trials (P < .05), with no differences between the latter 3 trials. Conclusions: The findings from this study suggest that combining severe-intensity priming exercise with a short-duration all-out starting strategy can expedite the adjustment of $\dot{V} O_{2}$ and lower completion time during a cycling performance trial to a greater extent than either intervention administered independently. These results might have implications for optimizing performance in short-duration high-intensity competitive events such as a 4-km cycling time trial.

^*Brock, Antonellis, Black, Vanhatalo, and Jones are with Sport and Health Sciences, University of Exeter, Exeter, United Kingdom. DiMenna is with the Dept of Biobehavioral Sciences, Columbia University, New York, NY. Bailey is with the School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, United Kingdom

Bailey (S.Bailey2@lboro.ac.uk) is corresponding author.

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