RT Journal Article SR Electronic T1 Labor Supply and Weight JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 85 OP 116 DO 10.3368/jhr.XLII.1.85 VO XLII IS 1 A1 Lakdawalla, Darius A1 Philipson, Tomas YR 2007 UL http://jhr.uwpress.org/content/XLII/1/85.abstract AB We use panel data from the National Longitudinal Survey of Youth to investigate on-the-job exercise and weight. For male workers, job-related exercise has causal effects on weight, but for female workers, the effects seem primarily selective. A man who spends 18 years in the most physical fitness-demanding occupation is about 25 pounds (14 percent) lighter than his peer in the least demanding occupation. These effects are strongest for the heaviest quartile of men. Conversely, a male worker spending 18 years in the most strength-demanding occupation is about 28 pounds (15 percent) heavier than his counterpart in the least demanding job.