To study the effects of occupational activity on age-related changes in fitness, 36 full time dairy farmers, aged 50–68years, were studied. Stature, weight, four skinfold thicknesses and hand grip strength were measured. Maximal oxygen consumption was estimated from the CAFT, a submaximal bench stepping test. Twenty-one of the subjects had been tested two years earlier as well. Approached cross-sectionally, the farmers show greater fat-free mass, higher grip strength values, and higher O2 max values than age-matched reference groups (STF and Nutrition Canada). Changes over two years in the sample subset include a marked decline in grip strength, anda decline in O2 which is consistent with that seen in other longitudinal studies. Hence, while initial fitness may be higher in this occupationally active group, the decline in function with age is comparable in magnitude to that seen in less active men.