Critical power is a key threshold determining the magnitude of post-exercise hypotension in non-hypertensive young males.

Autor: Lei TH; College of Physical Education, Hubei Normal University, Huangshi, China., Wang IL; College of Physical Education, Hubei Normal University, Huangshi, China., Chen YM; Department of Food Science, Fu Jen Catholic University, New Taipei City, Taiwan., Liu XH; College of Physical Education, Hubei Normal University, Huangshi, China., Fujii N; Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan., Koga S; Applied Physiology Laboratory, Kobe Design University, Kobe, Japan., Perry B; School of Health Sciences, Massey University, Wellington, New Zealand., Mundel T; Department of Kinesiology, Brock University, St Catharines, Canada., Wang F; Division Animal and Human Health Engineering, Department of Biosystems (BIOSYST), KU Leuven, Leuven, Belgium., Cao Y; School of Athletic Performance, Shanghai Sport University, Shanghai, China., Dobashi K; Faculty of Education, Hokkaido University of Education, Asahikawa, Japan., Kondo N; Laboratory for Applied Human Physiology, Graduate School of Human Development and Environment, Kobe University, Kobe, Japan., Li HY; College of Physical Education, Hubei Normal University, Huangshi, China., Goulding RP; Laboratory for Myology, Department of Human Movement Sciences, Faculty of Behavioral and Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands.
Jazyk: angličtina
Zdroj: Experimental physiology [Exp Physiol] 2023 Nov; Vol. 108 (11), pp. 1409-1421. Date of Electronic Publication: 2023 Sep 15.
DOI: 10.1113/EP091429
Abstrakt: The effect of different exercise intensities on the magnitude of post-exercise hypotension has not been rigorously clarified with respect to the metabolic thresholds that partition discrete exercise intensity domains (i.e., critical power and the gas exchange threshold (GET)). We hypothesized that the magnitude of post-exercise hypotension would be greater following isocaloric exercise performed above versus below critical power. Twelve non-hypertensive men completed a ramp incremental exercise test to determine maximal oxygen uptake and the GET, followed by five exhaustive constant load trials to determine critical power and W' (work available above critical power). Subsequently, criterion trials were performed at four discrete intensities matched for total work performed (i.e., isocaloric) to determine the impact of exercise intensity on post-exercise hypotension: 10% above critical power (10% > CP), 10% below critical power (10% < CP), 10% above GET (10% > GET) and 10% below GET (10% < GET). The post-exercise decrease (i.e., the minimum post-exercise values) in mean arterial (10% > CP: -12.7 ± 8.3 vs. 10% < CP: v3.5 ± 2.9 mmHg), diastolic (10% > CP: -9.6 ± 9.8 vs. 10% < CP: -1.4 ± 5.0 mmHg) and systolic (10% > CP: -23.8 ± 7.0 vs. 10% < CP: -9.9 ± 4.3 mmHg) blood pressures were greater following exercise performed 10% > CP compared to all other trials (all P < 0.01). No effects of exercise intensity on the magnitude of post-exercise hypotension were observed during exercise performed below critical power (all P > 0.05). Critical power represents a threshold above which the magnitude of post-exercise hypotension is greatly augmented. NEW FINDINGS: What is the central questions of this study? What is the influence of exercise intensity on the magnitude of post-exercise hypotension with respect to metabolic thresholds? What is the main finding and its importance? The magnitude of post-exercise hypotension is greatly increased following exercise performed above critical power. However, below critical power, there was no clear effect of exercise intensity on the magnitude of post-exercise hypotension.
(© 2023 The Authors. Experimental Physiology published by John Wiley & Sons Ltd on behalf of The Physiological Society.)
Databáze: MEDLINE
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