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November 1, 2002AJP Regulatory Integrative and Comparative Physiology

Effect of mild carboxy-hemoglobin on exercising skeletal muscle: intravascular and intracellular evidence

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Why the study?

Does mild carboxy-hemoglobin or hypoxia alter muscle blood flow, oxygen uptake, and intracellular bioenergetics during exercise in healthy young subjects?

Population

5 healthy young subjects

Comparison

Hypoxia, normoxia + CO, and 100% O2 + CO during… vs Normoxia

Design

Other

Authors

RRRussell S. RichardsonENElizabeth A. NoyszewskiBSBengt Saltin

Discussion

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Overview

Mild CO exposure should not yet alter clinical practice; hypothesis-generating for exercise limits in patients.

Structured PICO

Does mild carboxy-hemoglobin or hypoxia alter muscle blood flow, oxygen uptake, and intracellular bioenergetics during exercise in healthy young subjects?

P
Population
5 healthy young subjects
I
Intervention
Hypoxia (11% O2), normoxia + CO, and 100% O2 + CO during incremental single leg knee-extensor exercise
C
Comparator
Normoxia
O
Outcome
Muscle blood flow, muscle oxygen uptake (VO2), net muscle CO uptake, Mb saturation, and intracellular bioenergeticssurrogate

Mild carbon monoxide poisoning reduces arterial oxygen content and impairs exercise capacity and bioenergetics similarly to hypoxia.

Cite This Study

Richardson et al. (2002) studied this question.

synapsesocial.com/papers/6a1e0d8f8b32c80b546053d9https://doi.org/10.1152/ajpregu.00226.2002
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