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Is There an Optimal Ischaemic Preconditioning Dose to Improve Cycling Performance?

Cocking, S and Wilson, MG and Nichols, D and Cable, NT and Green, DJ and Thijssen, DHJ and Jones, H (2017) Is There an Optimal Ischaemic Preconditioning Dose to Improve Cycling Performance? International Journal of Sports Physiology and Performance. ISSN 1555-0273

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Abstract

INTRODUCTION: Ischaemic preconditioning (IPC) may enhance endurance performance. No previous study has directly compared distinct IPC protocols for optimal benefit. The aim of this study was to determine whether a specific IPC protocol (i.e. number of cycles, amount of muscle tissue, and local vs remote occlusion) elicits greater performance outcome. METHODS: Twelve cyclists performed five different IPC protocols 30-min prior to a blinded 375 kJ cycling time trial (TT) in a laboratory. Responses to traditional IPC (4x5-min legs) were compared to: i. 8x5-min legs and SHAM ("dose-cycles"), ii. 4x5-min unilateral legs ("dose-tissue"), and iii. 4x5-min arms ("remote"). RPE and blood lactate were recorded at each 25% TT completion. Power (watts), heart rate (bpm), and V̇O2 (ml.kg.min(-1)) were measured continuously throughout TT's. Magnitude based inference statistics were employed to compare variable differences to the minimal practically important difference. RESULTS: Traditional IPC was associated with a 17 (0, 34) secs faster TT time compared to SHAM. Applying more "dose-cycles" (8x5-min) had no impact on performance. Traditional IPC was associated with "likely trivial" higher blood lactate and "possibly beneficial" lower V̇O2 responses vs. SHAM. Unilateral IPC was associated with 18 (-11, 48) secs slower performance compared to bilateral ("dose-tissue"). TT times following remote and local IPC were not different [0 (-16, 16) secs]. CONCLUSION: The traditional 4x5-min (local or remote) IPC stimulus resulted in the fastest TT time compared to SHAM, there was no benefit of applying a greater number of cycles or employing unilateral IPC.

Item Type: Article
Uncontrolled Keywords: 1106 Human Movement And Sports Science
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sport & Exercise Sciences
Publisher: Human Kinetics
Related URLs:
Date Deposited: 12 Jul 2017 09:46
Last Modified: 13 Sep 2017 10:05
DOI or Identification number: 10.1123/ijspp.2017-0114
URI: http://researchonline.ljmu.ac.uk/id/eprint/6811

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