Acute psycho-physiological responses to perceptually regulated hypoxic and normoxic interval walks in overweight-to-obese adults

Journal article

Hobbins, L., Girard, O., Gaoua, N. and Hunter, S. (2021). Acute psycho-physiological responses to perceptually regulated hypoxic and normoxic interval walks in overweight-to-obese adults. Journal of Science and Medicine in Sport. 24 (5), pp. 481-487. https://doi.org/10.1016/j.jsams.2020.11.011
AuthorsHobbins, L., Girard, O., Gaoua, N. and Hunter, S.
Abstract Objectives We investigated psycho-physiological responses to perceptually regulated interval walks in hypoxia versus normoxia in obese individuals. Design Within-participants repeated measures. Methods Ten obese adults (BMI=32±3kg/m−2) completed a 60-min interval session (15×2min walking at a rating of perceived exertion of 14 on the 6–20 Borg scale with 2min of rest) either in hypoxia (FiO2 =13.0%, HYP) or normoxia (NOR). A third trial replicating the HYP speed pattern was carried out in normoxia as a control (CON). Exercise responses were analysed comparing the average of 1st to 3rd exercise bouts to those of the 4th–6th, 7th–9th, 10th–12th and 13th–15th exercise bouts (block 1 versus 2, 3, 4 and 5). Results Treadmill speed was slower during block 4 (6.14±0.67 versus 6.24±0.73km/h−1) and block 5 (6.12±0.64 versus 6.25±0.75km/h−1) in HYP compared to NOR or CON (p=0.009). Compared to NOR and CON, heart rate was +6–10% higher (p=0.001), whilst arterial oxygen saturation (−12–13%) was lower (p<0.001) in HYP. Perceived limb discomfort was lower in HYP and CON versus NOR (−21±4% and −34±6%; p=0.004). Conclusions In overweight-to-obese adults, perceptually regulated interval walks in hypoxia versus normoxia leads to progressively slower speeds along with lower limb discomfort and larger physiological stress than normoxia. Walking at the speed adopted in hypoxia produces similar psycho-physiological responses at the same absolute intensity in normoxia.
Year2021
JournalJournal of Science and Medicine in Sport
Journal citation24 (5), pp. 481-487
PublisherElsevier
ISSN14402440
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jsams.2020.11.011
Publication dates
Print30 Nov 2020
Online08 Apr 2021
Publication process dates
Deposited01 Dec 2020
Accepted16 Nov 2020
Accepted author manuscript
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Open
Licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
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