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Effects of Eight Interval Training Sessions in Hypoxia on Anaerobic, Aerobic, and High Intensity Work Capacity in Endurance Cyclists. | LitMetric

Effects of Eight Interval Training Sessions in Hypoxia on Anaerobic, Aerobic, and High Intensity Work Capacity in Endurance Cyclists.

High Alt Med Biol

Bond Institute of Health and Sport, Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Australia.

Published: December 2020

AI Article Synopsis

  • The study investigated whether eight sessions of steady-state, supramaximal interval training in low oxygen (hypoxia) improved anaerobic capacity and exercise performance in cyclists compared to training in normal oxygen levels (normoxia).
  • Eighteen cyclists participated, completing the interval training twice a week for four weeks, with no significant overall differences in anaerobic capacity or aerobic power between the two groups after the intervention.
  • However, the hypoxia group showed a notable improvement in both supramaximal work performed and peak aerobic power output, suggesting a slight advantage of training in low oxygen conditions for high-intensity exercise.

Article Abstract

This study aimed to determine if eight sessions of supramaximal but steady-state, set duration interval training in hypoxia enhanced measured anaerobic capacity and work performed during high intensity exercise. 21:370-377, 2020. Eighteen cyclists (O: 57 ± 7 ml·kg·min) were pair-matched for anaerobic capacity determined by maximal accumulated oxygen deficit (MAOD) and allocated to a 4-week interval training in hypoxia (IHT; FiO = 14.7% ± 0.5%,  = 9) or interval training in normoxia (NORM; FiO = 20.6% ± 0.3%,  = 9). Cyclists completed twice weekly interval training (8 × 1 minutes: ∼120% O, 5 minutes recovery: ∼50% O) in addition to their habitual training. Before and after the intervention, a constant work rate supramaximal time to fatigue and a graded exercise test were used to determine changes in anaerobic capacity/supramaximal work performed and aerobic capacity/peak aerobic power output, respectively. No interaction or main effects were observed. Using indirect calorimetry, anaerobic capacity was not significantly different in either group pre- to postintervention using MAOD (IHT: 4% ± 15%; NORM: -5% ± 12%) or gross efficiency methods (IHT: 7% ± 14%; NORM: -2% ± 9%), and VO was unchanged (IHT: 1% ± 6%; NORM: 1% ± 4%). However, within-group analysis shows that supramaximal work performed improved with IHT (14% ± 13%;  = 0.02;  = 0.42) but not NORM (1% ± 22%), and peak aerobic power output increased with IHT (5% ± 7%;  = 0.04;  = 0.32) but not NORM (2% ± 4%). Steady-state, set duration supramaximal interval training in hypoxia appears to provide a small beneficial effect on work capacity during supramaximal and high intensity exercise.

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Source
http://dx.doi.org/10.1089/ham.2020.0066DOI Listing

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