Acute physiological responses of blood flow restriction between high‐intensity interval repetitions in trained cyclists

Pugh, CF ORCID: https://orcid.org/0000-0002-0021-4901, Paton, CD, Ferguson, RA, Driller, MW and Beaven, CM, 2024. Acute physiological responses of blood flow restriction between high‐intensity interval repetitions in trained cyclists. European Journal of Sport Science, 24 (6), pp. 777-787. ISSN 1746-1391

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Abstract

lood flow restriction (BFR) is increasingly being used to enhance aerobic performance in endurance athletes. This study examined physiological responses to BFR applied in recovery phases within a high-intensity interval training (HIIT) session in trained cyclists. Eleven competitive road cyclists (mean ± SD, age: 28 ± 7 years, body mass: 69 ± 6 kg, peak oxygen uptake: 65 ± 9 mL · kg−1 · min−1) completed two randomised crossover conditions: HIIT with (BFR) and without (CON) BFR applied during recovery phases. HIIT consisted of six 30-s cycling bouts at an intensity equivalent to 85% of maximal 30-s power (523 ± 93 W), interspersed with 4.5-min recovery. BFR (200 mmHg, 12 cm cuff width) was applied for 2-min in the early recovery phase between each interval. Pulmonary gas exchange (V̇O2, V̇CO2, and V̇E), tissue oxygen saturation index (TSI), heart rate (HR), and serum vascular endothelial growth factor concentration (VEGF) were measured. Compared to CON, BFR increased V̇CO2 and V̇E during work bouts (both p < 0.05, dz < 0.5), but there was no effect on V̇O2, TSI, or HR (p > 0.05). In early recovery, BFR decreased TSI, V̇O2, V̇CO2, and V̇E (all p < 0.05, dz > 0.8) versus CON, with no change in HR (p > 0.05). In late recovery, when BFR was released, V̇O2, V̇CO2, V̇E, and HR increased, but TSI decreased versus CON (all p < 0.05, dz > 0.8). There was a greater increase in VEGF at 3-h post-exercise in BFR compared to CON (p < 0.05, dz > 0.8). Incorporating BFR into HIIT recovery phases altered physiological responses compared to exercise alone.

Item Type:	Journal article
Publication Title:	European Journal of Sport Science
Creators:	Pugh, C.F., Paton, C.D., Ferguson, R.A., Driller, M.W. and Beaven, C.M.
Publisher:	Wiley
Date:	June 2024
Volume:	24
Number:	6
ISSN:	1746-1391
Identifiers:	Number Type 10.1002/ejsc.12107 DOI 2259138 Other
Rights:	© 2024 the authors. European Journal of Sport Science published by Wiley-VCH GmbH on behalf of European College of Sport Science. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	22 Oct 2024 08:01
Last Modified:	22 Oct 2024 08:01
URI:	https://irep.ntu.ac.uk/id/eprint/52445

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