Vascular and oxygenation responses of local ischemia and systemic hypoxia during arm cycling repeated sprints.

Details

Serval ID
serval:BIB_55EB28FB0DFD
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Vascular and oxygenation responses of local ischemia and systemic hypoxia during arm cycling repeated sprints.
Journal
Journal of science and medicine in sport
Author(s)
Willis S.J., Peyrard A., Rupp T., Borrani F., Millet G.P.
ISSN
1878-1861 (Electronic)
ISSN-L
1878-1861
Publication state
Published
Issued date
10/2019
Peer-reviewed
Oui
Volume
22
Number
10
Pages
1151-1156
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
The purpose of this study was to investigate the acute vascular and oxygenation responses to repeated sprint exercise during arm cycling with either blood flow restriction (BFR) or systemic hypoxia alone or in combination.
The study design was a single-blinded repeated-measures assessment of four conditions with two levels of normobaric hypoxia (400 m and 3800 m) and two levels of BFR (0% and 45% of total occlusion).
Sixteen active participants (eleven men and five women; mean ± SD; 26.4 ± 4.0 years old; 73.8 ± 9.8 kg; 1.79 ± 0.07 m) completed 5 sessions (1 familiarization, 4 conditions). During each test visit, participants performed a repeated sprint arm cycling test to exhaustion (10 s maximal sprints with 20 s recovery until exhaustion) to measure power output, metabolic equivalents, blood flow, as well as oxygenation (near-infrared spectroscopy) of the biceps brachii muscle tissue.
Repeated sprint performance was decreased with both BFR and systemic hypoxia conditions. Greater changes between minimum-maximum of sprints in total hemoglobin concentration (Δ[tHb]) were demonstrated with BFR (400 m, 45% and 3800 m, 45%) than without (400 m, 0% and 3800 m, 0%) (p < 0.001 for both). Additionally, delta tissue saturation index (ΔTSI) decreased more with both BFR conditions than without (p < 0.001 for both). The absolute maximum TSI was progressively reduced with both BFR and systemic hypoxia (p < 0.001).
By combining high-intensity, repeated sprint exercise with BFR and/or systemic hypoxia, there is a robust stimulus detected by increased changes in blood perfusion placed on specific vascular mechanisms, which were more prominent in BFR conditions.
Keywords
Adult, Arm/blood supply, Exercise, Female, Hemoglobins/analysis, Humans, Hypoxia, Ischemia, Male, Oxygen/blood, Oxygen Consumption, Young Adult, Altitude, Blood flow restriction, Blood volume, Extraction, Occlusion, Perfusion
Pubmed
Web of science
Open Access
Yes
Create date
25/05/2019 12:05
Last modification date
04/01/2020 7:17
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