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Cited by 390

The DOI matches its Crossref record; 41 of the 41 references it cites were found in a registry or an index.

Arterial oxygenation influences central motor output and exercise performance via effects on peripheral locomotor muscle fatigue in humans

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Amann, Markus, Eldridge, Marlowe W., Lovering, Andrew T., Stickland, Michael K., Pegelow, David F., Dempsey, Jerome A.·2006·The Journal of Physiology
DOI 10.1113/jphysiol.2006.113936
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Abstract

Changing arterial oxygen content (C) has a highly sensitive influence on the rate of peripheral locomotor muscle fatigue development. We examined the effects of C on exercise performance and its interaction with peripheral quadriceps fatigue. Eight trained males performed four 5 km cycling time trials (power output voluntarily adjustable) at four levels of C (17.6–24.4 ml O 2 dl−1), induced by variations in inspired O 2 fraction (0.15–1.0). Peripheral quadriceps fatigue was assessed via changes in force output pre‐ versus post‐exercise in response to supra‐maximal magnetic femoral nerve stimulation (Δ Qtw; 1–100 Hz). Central neural drive during the time trials was estimated via quadriceps electromyogram. Increased C from hypoxia to hyperoxia resulted in parallel increases in central neural output (43%) and power output (30%) during cycling and improved time trial performance (12%); however, the magnitude of Δ Qtw (−33 to −35%) induced by the exercise was not different among the four time trials (P > 0.2). These effects of C on time trial performance and Δ Qtw were reproducible (coefficient of variation = 1–6%) over repeated trials at each F on separate days. In the same subjects, changing C also affected performance time to exhaustion at a fixed work rate, but similarly there was no effect of Δ C on peripheral fatigue. Based on these results, we hypothesize that the effect of C on locomotor muscle power output and exercise performance time is determined to a significant extent by the regulation of central motor output to the working muscle in order that peripheral muscle fatigue does not exceed a critical threshold.

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Metadata

Authors
Amann, M., Eldridge, M. W., Lovering, A. T., Stickland, M. K., Pegelow, D. F., & Dempsey, J. A.
Venue
The Journal of Physiology
Publisher
Wiley
Published
2006-09-06
Volume
575
Issue
3
Pages
937-952
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
DOI
10.1113/jphysiol.2006.113936
OpenAlex
W1546019921
Cited by
390
References
41
FWCI
53.28
Type
journal article
Language
en
Open access
green

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