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The Effect of Ischemic Preconditioning on Maximal Swimming Performance

Natalie Brown Orcid Logo, N. Williams, M. Russell, C.J. Cook, L.P. Kilduff, Liam Kilduff Orcid Logo

Journal of Strength and Conditioning Research, Volume: 35, Issue: 1, Pages: 221 - 226

Swansea University Authors: Natalie Brown Orcid Logo, Liam Kilduff Orcid Logo

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DOI (Published version): 10.1519/JSC.0000000000002485

Abstract

The effect of ischemic preconditioning (IPC) on swimming performance was examined. Using a randomized, crossover design, National-and International-level swimmers (n=20; 14 males, 6 females) participated in three trials (Con, IPC-2h, IPC-24h). Lower-body IPC (4 x 5 min bi-lateral blood-flow restrict...

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Published in: Journal of Strength and Conditioning Research
ISSN: 1064-8011
Published: 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa38240
Abstract: The effect of ischemic preconditioning (IPC) on swimming performance was examined. Using a randomized, crossover design, National-and International-level swimmers (n=20; 14 males, 6 females) participated in three trials (Con, IPC-2h, IPC-24h). Lower-body IPC (4 x 5 min bi-lateral blood-flow restriction at 160-228 mmHg, and 5 min reperfusion) was used 2- (IPC-2h) or 24-h (IPC-24h) before a self-selected (100 m, n=15; 200 m, n=5) swimming time-trial (TT). The Con trial used a sham intervention (15 mmHg) 2h prior to exercise. All trials required a 40-min standardized pre-competition swimming warm-up (followed by 20-min rest; replicating pre-competition call room procedures) 1h before TT. Capillary blood (pH, blood gases and lactate concentrations) was taken immediately pre-and post-IPC, pre-TT and post-TT. No effects on TT for 100 m (P=0.995; IPC-2h: 64.94±8.33 s; IPC-24h: 64.67±8.50 s; Con: 64.94± 8.24 s), 200 m (P=0.405; IPC-2h: 127.70±10.66 s; IPC-24h: 129.26±12.99 s; Con: 130.19±10.27 s) or combined total time (IPC-2h: 84.27±31.52 s; IPC-24h: 79.87±29.72 s; Con: 80.55±31.35 s) were observed following IPC. Base excess (IPC-2h: -13.37±8.90 mmol⋅L-1; Con: -13.35±7.07 mmol⋅L-1; IPC-24h: -16.53±4.65 mmol⋅L-1), pH (0.22±0.08; all conditions), bicarbonate (IPC-2h: -11.66±3.52 mmol⋅L-1; Con: -11.62±5.59 mmol⋅L-1; IPC-24h: -8.47±9.02 mmol⋅L-1), total carbon dioxide (IPC-2h: -12.90±3.92 mmol⋅L-1; Con: -11.55±7.61 mmol⋅L-1; IPC-24h: 9.90±8.40 mmol⋅L-1), percentage oxygen saturation (IPC-2h: -0.16±1.86%; Con: +0.20±1.93%; IPC-24h: +0.47±2.10%) and blood lactate (IPC-2h: +12.87±3.62 mmol⋅L-1; Con: +12.41±4.02 mmol⋅L-1; IPC-24h: +13.27±3.81 mmol⋅L-1) were influenced by swimming TT (P<0.001), but not condition (all P>0.05). No effect of IPC was seen when applied 2- or 24-h before swimming TT on any indices of performance or physiological measures recorded.
College: Faculty of Science and Engineering
Issue: 1
Start Page: 221
End Page: 226

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