August 1, 1993Medicine & Science in Sports & Exercise
Cigarette smoking and submaximal exercise test duration in a biracial population of young adults
Key result
Cigarette smoking in young adults was associated with a 29 to 64 seconds shorter mean exercise test duration compared with nonsmokers (P<0.001).
Why the study?
Does cigarette smoking affect submaximal exercise test duration and heart rate response in young adults?
Population
4,968 white and black adults, ages 18-30 yr
Comparison
Cigarette smoking vs Nonsmokers
Design
Cross-sectional
Authors
Discussion
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Implication
Interpret submaximal tests cautiously in young smokers; leaves open whether cessation improves capacity.
Study Design
Type
Cross-Sectional (n=4,968)
Structured PICO
Does cigarette smoking affect submaximal exercise test duration and heart rate response in young adults?
P
Population
4,968 white and black adults, ages 18 to 30 years, who underwent symptom-limited graded exercise treadmill testing during a baseline examination.
E
Exposure
Cigarette smoking
C
Comparator
Nonsmokers
O
Outcome
Mean exercise test durationsurrogate
Main Result
Effect estimate: 29-64 s shorter
p-value: p=<0.001
Chronic smoking blunts the heart rate response to exercise, increasing exercise duration to submaximal heart rates despite impairing maximal performance, which may lead to overestimation of fitness in smokers during submaximal testing.
Cite This Study
Sidney et al. (1993) reported a cross-sectional. Cigarette smoking vs. Nonsmokers was evaluated on Mean exercise test duration (29-64 s shorter, p=<0.001). Cigarette smoking in young adults was associated with a 29 to 64 seconds shorter mean exercise test duration compared with nonsmokers (P<0.001).