Quantifying the effects of acute altitude exposure on exercise performance and capacity: a systematic review and meta-regression
Article
Article Title | Quantifying the effects of acute altitude exposure on exercise performance and capacity: a systematic review and meta-regression |
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ERA Journal ID | 9751 |
Article Category | Article |
Authors | Deb, Sanjoy K. (Author), Brown, Daniel R. (Author), Gough, Lewis A. (Author), McLellan, Christopher P. M. (Author), Swinton, Paul A. (Author), Sparks, S. Andy (Author) and McNaughton, Lars R. (Author) |
Journal Title | European Journal of Sport Science |
Journal Citation | 18 (2), pp. 243-256 |
Number of Pages | 15 |
Year | 2017 |
Publisher | Taylor & Francis |
Place of Publication | United Kingdom |
ISSN | 1536-7290 |
1746-1391 | |
Digital Object Identifier (DOI) | https://doi.org/10.1080/17461391.2017.1410233 |
Web Address (URL) | https://www.tandfonline.com/doi/full/10.1080/17461391.2017.1410233 |
Abstract | Objective: To quantify the effects of acute hypoxic exposure on exercise capacity and performance, which includes continuous and intermittent forms of exercise. Design: A systematic review was conducted with a three-level mixed effects meta-regression. The ratio of means method was used to evaluate main effects and moderators providing practical interpretations with percentage change. Data sources: A systemic search was performed using three databases (Google scholar, PubMed and SPORTDiscus). Eligibility criteria for selecting studies: Inclusion was restricted to investigations that assessed exercise performance (time trials (TTs), sprint and intermittent exercise tests) and capacity (time to exhaustion test, TTE) with acute hypoxic (<24 h) exposure and a normoxic comparator. Results: Eighty-two outcomes from 53 studies (N = 798) were included in this review. The results show an overall reduction in exercise performance/capacity −17.8 ± 3.9% (95% CI −22.8% to −11.0%), which was significantly moderated by −6.5 ± 0.9% per 1000 m altitude elevation (95% CI −8.2% to −4.8%) and oxygen saturation (−2.0 ± 0.4%; 95% CI −2.9% to −1.2%). TT (−16.2 ± 4.3%; 95% CI −22.9% to −9%) and TTE (−44.5 ± 6.9%; 95% CI −51.3% to −36.7%) elicited a negative effect, whilst indicating a quadratic relationship between hypoxic magnitude and both TTE and TT performance. Furthermore, exercise less than 2 min exhibited no ergolytic effect from acute hypoxia. Summary/Conclusion: This review highlights the ergolytic effect of acute hypoxic exposure, which is curvilinear for TTE and TT performance with increasing hypoxic levels, but short duration intermittent and sprint exercise seem to be unaffected. |
Keywords | Altitude, intermittent hypoxic training, extreme environments, environmental physiology |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 420799. Sports science and exercise not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Edge Hill University, United Kingdom |
Bond University | |
Robert Gordon University, United Kingdom | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5zyw/quantifying-the-effects-of-acute-altitude-exposure-on-exercise-performance-and-capacity-a-systematic-review-and-meta-regression
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