Effects of low and high levels of moderate hypoxia on anaerobic energy release during supramaximal cycle exercise

The purpose of this study was to investigate whether hypoxia can alter anaerobic energy release during supramaximal exercise. Seven male subjects performed 12 submaximal cycling tests to establish the relationship between workload and O2 demand. The subjects also performed 40 s Wingate tests (WT) un...

Full description

Saved in:
Bibliographic Details
Published in:European journal of applied physiology 2006-09, Vol.98 (1), p.41-47
Main Authors: Ogura, Yuji, Katamoto, Shizuo, Uchimaru, Jin, Takahashi, Kohei, Naito, Hisashi
Format: Article
Language:English
Subjects:
Adaptation, Physiological
Adult
Anaerobic Threshold
Energy Transfer
Exercise Test
Exercise Tolerance
Humans
Hypoxia
Hypoxia - classification
Hypoxia - physiopathology
Male
Oxygen - metabolism
Oxygen Consumption
Physical Exertion
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The purpose of this study was to investigate whether hypoxia can alter anaerobic energy release during supramaximal exercise. Seven male subjects performed 12 submaximal cycling tests to establish the relationship between workload and O2 demand. The subjects also performed 40 s Wingate tests (WT) under normoxia (room air), two levels of moderate hypoxia of 16.4% O2 and 12.7% O2. We measured the power output and oxygen uptake (VO2) during each test and estimated the O2 demand, O2 deficit and percentage of anaerobic energy release (%AnAER). These data were analyzed for each 20 s interval. At all intervals, there were no differences in Pmean per body mass (BM)(-1), O2 demand per BM(-1) or O2 deficit per BM(-1) among the three O2 conditions. However, under hypoxia of 12.7%, VO2 per BM(-1) was significantly decreased and %AnAER was significantly increased in the late phase (20-40 s) of the WT, compared to normoxia (P
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-006-0214-9