Metabolic equivalents 21 24.5 28 31.5 35 38.5 42 ml per kg per min
Figure 4 Age-adjusted, all-cause mortality rates per 10000 person-years of follow-up by physical fitness categories in 3120 women and 10224 men. Physical fitness categories are expressed as maximal metabolic equivalents (work metabolic rate/resting metabolic rate) achieved during the maximal treadmill exercise test. One metabolic equivalent equals 3.5 ml kg-1 min-1. The estimated maximal oxygen uptake for each category is shown also. (From Blair SN et al. (1989) Physical fitness and all-cause mortality. A prospective study of healthy men and women. Journal of the American Medical Association 262: 2395-2401, with permission.)
formal aerobic exercise programs and sports. Intermittent or shorter bouts of activity (of at least 10 minutes duration) may be accumulated throughout the day to confer similar benefits to single, continuous 30-minute bouts of exercise. A consistent finding is that previous exercise that has been abandoned confers no benefit.
Desirable aerobic fitness levels have also been described for women (maximal aerobic power of approximately 9 METs [32.5 ml kg-1 min-1]) and men (10 METs [35 ml kg-1 min-1]) (Figure 4).
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