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Seven-day ischaemic preconditioning improves muscle efficiency during cycling

Owen Jeffries, Daniel Thomas Evans, Mark Waldron Orcid Logo, Adam Coussens, Stephen Patterson

Journal of Sports Sciences, Volume: 37, Issue: 24, Pages: 2798 - 2805

Swansea University Author: Mark Waldron Orcid Logo

Abstract

Ischaemic preconditioning (IPC) has emerged as a potential non-invasive ergogenic aid to enhance exercise performance. Repeated application of IPC has demonstrated clinical efficacy, therefore our aims were to investigate its effect on endurance cycling performance and muscle efficiency. Twenty part...

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Published in: Journal of Sports Sciences
ISSN: 0264-0414 1466-447X
Published: Informa UK Limited 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa51673
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first_indexed 2019-09-04T14:49:48Z
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spelling 2020-08-20T16:12:34.0380443 v2 51673 2019-09-04 Seven-day ischaemic preconditioning improves muscle efficiency during cycling 70db7c6c54d46f5e70b39e5ae0a056fa 0000-0002-2720-4615 Mark Waldron Mark Waldron true false 2019-09-04 STSC Ischaemic preconditioning (IPC) has emerged as a potential non-invasive ergogenic aid to enhance exercise performance. Repeated application of IPC has demonstrated clinical efficacy, therefore our aims were to investigate its effect on endurance cycling performance and muscle efficiency. Twenty participants undertook 7-d repeated bilateral lower limb occlusion (4 x 5-min) of IPC (220 mmHg) or sham (20 mmHg). Prior to and 72-h following the intervention, participants performed submaximal cycling at 70, 80 and 90% of ventilatory threshold (VT) followed by an incremental exercise test. IPC had no effect on VO2max (P = 0.110); however, time to exhaustion increased by ~ 9% and Wmax by ~ 5 % (IPC pre 307 ± 45 to post 323 ± 51 W) relative to sham (P = 0.002). There were no changes in gross efficiency (GE) (P > 0.05); however, delta efficiency (DE) increased by 3.1% following IPC (P = 0.011). Deoxyhaemoglobin (HHb) was reduced following IPC ~ 30% (P = 0.017) with no change in total haemoglobin (tHb). Repeated IPC over 7-d enhanced muscle efficiency and extended cycling performance. The physiological effects of repeated IPC on skeletal muscle efficiency explains the notable improvements in endurance performance. Journal Article Journal of Sports Sciences 37 24 2798 2805 Informa UK Limited 0264-0414 1466-447X 17 12 2019 2019-12-17 10.1080/02640414.2019.1664537 http://dx.doi.org/10.1080/02640414.2019.1664537 COLLEGE NANME Sport and Exercise Sciences COLLEGE CODE STSC Swansea University 2020-08-20T16:12:34.0380443 2019-09-04T10:06:37.1634015 Owen Jeffries 1 Daniel Thomas Evans 2 Mark Waldron 0000-0002-2720-4615 3 Adam Coussens 4 Stephen Patterson 5 0051673-04092019100837.pdf jeffries2019(3).pdf 2019-09-04T10:08:37.6970000 Output 873089 application/pdf Accepted Manuscript true 2020-09-09T00:00:00.0000000 false eng
title Seven-day ischaemic preconditioning improves muscle efficiency during cycling
spellingShingle Seven-day ischaemic preconditioning improves muscle efficiency during cycling
Mark Waldron
title_short Seven-day ischaemic preconditioning improves muscle efficiency during cycling
title_full Seven-day ischaemic preconditioning improves muscle efficiency during cycling
title_fullStr Seven-day ischaemic preconditioning improves muscle efficiency during cycling
title_full_unstemmed Seven-day ischaemic preconditioning improves muscle efficiency during cycling
title_sort Seven-day ischaemic preconditioning improves muscle efficiency during cycling
author_id_str_mv 70db7c6c54d46f5e70b39e5ae0a056fa
author_id_fullname_str_mv 70db7c6c54d46f5e70b39e5ae0a056fa_***_Mark Waldron
author Mark Waldron
author2 Owen Jeffries
Daniel Thomas Evans
Mark Waldron
Adam Coussens
Stephen Patterson
format Journal article
container_title Journal of Sports Sciences
container_volume 37
container_issue 24
container_start_page 2798
publishDate 2019
institution Swansea University
issn 0264-0414
1466-447X
doi_str_mv 10.1080/02640414.2019.1664537
publisher Informa UK Limited
url http://dx.doi.org/10.1080/02640414.2019.1664537
document_store_str 1
active_str 0
description Ischaemic preconditioning (IPC) has emerged as a potential non-invasive ergogenic aid to enhance exercise performance. Repeated application of IPC has demonstrated clinical efficacy, therefore our aims were to investigate its effect on endurance cycling performance and muscle efficiency. Twenty participants undertook 7-d repeated bilateral lower limb occlusion (4 x 5-min) of IPC (220 mmHg) or sham (20 mmHg). Prior to and 72-h following the intervention, participants performed submaximal cycling at 70, 80 and 90% of ventilatory threshold (VT) followed by an incremental exercise test. IPC had no effect on VO2max (P = 0.110); however, time to exhaustion increased by ~ 9% and Wmax by ~ 5 % (IPC pre 307 ± 45 to post 323 ± 51 W) relative to sham (P = 0.002). There were no changes in gross efficiency (GE) (P > 0.05); however, delta efficiency (DE) increased by 3.1% following IPC (P = 0.011). Deoxyhaemoglobin (HHb) was reduced following IPC ~ 30% (P = 0.017) with no change in total haemoglobin (tHb). Repeated IPC over 7-d enhanced muscle efficiency and extended cycling performance. The physiological effects of repeated IPC on skeletal muscle efficiency explains the notable improvements in endurance performance.
published_date 2019-12-17T04:00:01Z
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