Effects Of Normobaric Hypoxia On Upper Body Critical Power And Anaerobic Working Capacity

Keywords

Altitude; Environment; Fatigue; Metabolism; Work-time relationship

Abstract

Purpose To evaluate the effects of moderate normobaric hypoxia on the parameters of the work-time relationship in the upper body. Methods Twenty-one recreationally active men completed a graded exercise test in both normobaric hypoxia (H) and normoxia (N) to exhaustion on an arm ergometer to determine V̇O2peak and peak power output (PPO). Each participant completed four constant work-rate (CWR) arm-cranking tests at 90–120% PPO in both environmental conditions. Linear regression was used to estimate critical power (CP) and anaerobic working capacity (AWC) via work-time relationship during the CWR tests. Results H significantly reduced V̇O2peak (N: 2.34 ± 0.34 L vs. H: 2.27 ± 0.34 L, p = 0.041), PPO (N: 125.29 ± 17.98 W vs. H: 121.11 ± 17.98 W, p = 0.001), and CP (N: 90.22 ± 12.88 W vs. H: 85.26 ± 9.64 W, p = 0.042), but had no effect on AWC (N: 9.16 ± 2.81 kJ vs. H: 8.75 ± 3.23 kJ, p = 0.600). Discussion Moderate normobaric hypoxia appears to reduce CP in the upper body but has a variable effect on AWC.

Publication Date

2-1-2018

Publication Title

Respiratory Physiology and Neurobiology

Volume

249

Number of Pages

1-6

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.resp.2017.12.002

Socpus ID

85038017972 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85038017972

This document is currently not available here.

Share

COinS