Key result
Inspiring up to 3.50% carbon dioxide during exercise significantly increased ventilation but did not significantly alter perceived exertion ratings except at the highest running speed.
Why the study?
Does inspiring carbon dioxide alter perceived exertion during exercise?
Population
Subjects performing running and cycling exercise tasks
Comparison
Breathing air + 1.75% carbon dioxide and… vs Breathing air (normocapnia) during exercise
Design
Other
Follow-up
single session
Authors
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Hypercapnia may alter perceived exertion during exercise; leaves open relevance to clinical populations or performance.
Does inspiring carbon dioxide alter perceived exertion during exercise?
Ventilation per se does not provide the primary cue for the selection of perceived exertion ratings during exercise, except possibly at high levels of exercise.
CAEAUELLI et al. (1976) studied this question. Inspired Carbon Dioxide vs. Breathing air was evaluated on Perceived exertion ratings and ventilation. Inspiring up to 3.50% carbon dioxide during exercise significantly increased ventilation but did not significantly alter perceived exertion ratings except at the highest running speed.
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