Why the study?
Does aging affect the adaptation of pulmonary O2 uptake and muscle deoxygenation at the onset of heavy-intensity exercise?
Population
11 adults, comprising young (mean age 24 +/- 4 yr, n=5) and older (mean age 68 +/- 3 yr, n=6) adults.
Comparison
Heavy-intensity, constant-load cycling exercise. vs Young adults compared to older adults.
Design
Cross-sectional
Authors
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May limit exercise tolerance in older adults; leaves open mechanisms and clinical relevance pending longitudinal studies.
Does aging affect the adaptation of pulmonary O2 uptake and muscle deoxygenation at the onset of heavy-intensity exercise?
Older adults exhibit slower pulmonary O2 uptake kinetics and faster muscle deoxygenation during heavy-intensity exercise, suggesting slower adaptation of local muscle blood flow compared to young adults.
DeLorey et al. (2005) studied this question.
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