This investigation evaluated the efficacy of training at moderate -- 60% maximal heart rate reserve, HRRmax (MOD) and low -- 40% HRRmax (LOW) intensities in a population of older American women (N = 16, mean age 78.4 years). Prior to and immediately following a 10-week training program consisting of exercising at the prescribed heart-rate intensity with a caloric expenditure of 100 calories, the following measurements were performed: Maximal oxygen consumption (VO2max), maximal lactate production (HLAmax), maximal heart rate (HRmax), maximal workstage (WSmax), total cholesterol (TOTC), high density lipoprotein cholesterol (HDLC), and rate pressure product max (RPPmax). Significant differences, p < 0.05, were noted pre- to post-training for measures of VO2max, whether expressed in l/min or ml/kg/min, and WSmax. No statistical differences existed between the groups pre- or post-training for these measures. The results suggest that the low-intensity exercise prescription provides an adequate training stimulus for older women who have been sedentary and who might be at higher risk for cardiac or musculoskeletal injury, particularly at the initiation of an exercise program.
Copyright the Gerontological Society of America. Reproduced by permission of the publisher.

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