Medicine & Science in Sports & Exercise · 2003 · 193 citations · 7 references
Weekly leisure-time energy expenditure averaged approximately 15-20% higher during spring and summer. Much of this difference was due to active respondents participating in a second activity during these seasons.
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Leisure-Time Physical Activity Among US Adults
Carlos J. Crespo · Archives of Internal Medicine · 1996 · 500 citations
LEISURE TIME PHYSICAL ACTIVITY IN THE FRAMINGHAM OFFSPRING STUDY
Andrew L. Dannenberg, Jacob B. Keller, Peter W.F. Wilson et al. · American Journal of Epidemiology · 1989 · 190 citations
Intra-Individual Variation and Estimates of Usual Physical Activity
Sarah Levin, David R. Jacobs, Barbara E. Ainsworth et al. · Annals of Epidemiology · 1999 · 190 citations