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Proceedings Paper

The effects of acute hypoxia on heart rate variability parameters
Author(s): Taylor A. Teckchandani; Jyotpal Singh; David Mac Quarrie; J. Patrick Neary
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Paper Abstract

We investigated the effects of acute hypoxia on heart rate variability (HRV) parameters during supine rest and moderate-intensity exercise. 27 male (age= 28±11 yr, height= 177±6 cm, mass= 79±9 kg) and 4 female (age= 25±7 yr, height= 169±7 cm, mass= 60±5kg) participants were recruited. Participants rested for 30 minutes in a supine position, after which 5 minutes of isometric squat-stands (0.05 Hz) were performed. This was performed under both normoxic and hypoxic (14.8% oxygen; ~2750m) conditions. Within subject comparisons were made between the last 5 minutes of each supine portion, and between the squat-stand maneuvers at normoxia vs. hypoxia. Depending on normality distribution, a Wilcoxon signed-rank test or a paired sample t-test was used with alpha set at p<0.05. Significant differences in %LF (48±18 vs 56±16), %HF (44±19 vs 35±18), LF/HF ratio (1.8±2 vs 2.3±1), NN50 beats (104±61 vs 82±70), pNN50 (36±22 vs 27±24), SD1 (50±31 vs 42±30), SD2 (101±55 vs 90±46), SD2/SD1 ratio (2.4±1 vs 2.7±1), and % determinism (97±2 vs 98±1) were seen between normoxia and hypoxia, respectively. Significant differences in NN50 (92±26 vs 81±30), pNN50 (21±6 vs 17±7), SD2 (188±60 vs 177±56) and sample entropy (0.3±0.2 vs 0.2±0.1) were also seen during squat-stands between normoxia and hypoxia, respectively. These results suggest changes in physiology and HRV parameters during exposure to acute hypoxia. This research has implications for autonomic function and its influence on cardiac control at altitude.

Paper Details

Date Published: 21 February 2020
PDF: 7 pages
Proc. SPIE 11237, Biophotonics in Exercise Science, Sports Medicine, Health Monitoring Technologies, and Wearables, 112370F (21 February 2020); doi: 10.1117/12.2547898
Show Author Affiliations
Taylor A. Teckchandani, Univ. of Regina (Canada)
Jyotpal Singh, Univ. of Regina (Canada)
David Mac Quarrie, LLA Technologies Inc. (Canada)
J. Patrick Neary, Univ. of Regina (Canada)


Published in SPIE Proceedings Vol. 11237:
Biophotonics in Exercise Science, Sports Medicine, Health Monitoring Technologies, and Wearables
Babak Shadgan; Amir H. Gandjbakhche, Editor(s)

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