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Does obstructive sleep apnea impair the cardiopulmonary response to exercise?
Camila F Rizzi1, Fatima Cintra, Luciane Mello-Fujita
1Sleep Medicine and Biology Discipline, Psychobiology Department, Universidade Federal de São Paulo, São Paulo, Brazil.
Obesity, not obstructive sleep apnea (OSA), significantly impacts exercise cardiorespiratory function. Factors like body mass index and male sex with diabetes independently predict maximal oxygen uptake (VO2max).
Area of Science:
- Cardiorespiratory physiology
- Sleep medicine
- Obesity research
Background:
- Obstructive sleep apnea (OSA) is linked to various health issues.
- The impact of obesity on cardiopulmonary exercise performance in OSA patients requires further investigation.
Purpose of the Study:
- To compare cardiopulmonary exercise performance in lean and obese patients with OSA versus controls.
- To identify factors influencing exercise capacity in these groups.
Main Methods:
- A case-control study involving lean and obese individuals with and without OSA.
- Participants underwent clinical evaluation, polysomnography, cardiopulmonary exercise testing, echocardiography, and spirometry.
Main Results:
- Obese patients with OSA and obese controls exhibited significantly lower maximal oxygen uptake (VO2max) and maximal carbon dioxide production (VCO2max).
- Body mass index and male sex combined with diabetes were independent predictors of VO2max.
- Obstructive sleep apnea (OSA) severity markers (apnea-hypopnea index, arousal index, SaO2) differed among groups.
Conclusions:
- Obesity, independent of OSA, and sex associated with diabetes significantly influence cardiorespiratory exercise function.
- Obstructive sleep apnea (OSA) itself did not appear to be the primary driver of reduced exercise capacity in this cohort.
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