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Ischemic preconditioning enhances critical power during a 3 minute all-out cycling test

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posted on 20.07.2017, 12:41 authored by Patrick J. Griffin, Richard FergusonRichard Ferguson, Conor Gissane, Stephen BaileyStephen Bailey, Stephen D. Patterson
This study tested the hypothesis that ischemic preconditioning (IPC) would increase critical power (CP) during a 3 minute all-out cycling test. Twelve males completed two 3 minute all-out cycling tests, in a crossover design, separated by 7 days. These tests were preceded by IPC (4 x 5 minute intervals at 220 mmHg bilateral leg occlusion) or SHAM treatment (4 x 5 minute intervals at 20 mmHg bilateral leg occlusion). CP was calculated as the mean power output during the final 30 s of the 3 minute test with W′ taken as the total work done above CP. Muscle oxygenation was measured throughout the exercise period. There was a 15.3 ± 0.3% decrease in muscle oxygenation (TSI; [Tissue saturation index]) during the IPC stimulus, relative to SHAM. CP was significantly increased (241 ± 65 W vs. 234 ± 67 W), whereas W′ (18.4 ± 3.8 vs 17.9 ± 3.7 kJ) and total work done (TWD) were not different (61.1 ± 12.7 vs 60.8 ± 12.7 kJ), between the IPC and SHAM trials. IPC enhanced CP during a 3 minute all-out cycling test without impacting W′ or TWD. The improved CP after IPC might contribute towards the effect of IPC on endurance performance.

History

School

  • Sport, Exercise and Health Sciences

Published in

Jorunal of Sport Sciences

Citation

GRIFFIN, P.J. ... et al, 2018. Ischemic preconditioning enhances critical power during a 3 minute all-out cycling test. Journal of Sport Sciences, 36(9), pp.1038-1043.

Publisher

© Taylor and Francis

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

22/06/2017

Publication date

2018

Notes

This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sport Sciences on 7 July 2017, available online: http://www.tandfonline.com/10.1080/02640414.2017.1349923.

ISSN

0264-0414

eISSN

1466-447X

Language

en