Target intensity for health benefits = 40% VO2 max = 63% HR max Target intensity for aerobic fitness = 60-80% VO2max = 75-88% HR max Target intensity for elite training = >85% VO2max = >92% HR max Swain et al equation: % HR max = 0.64 x % VO2 max + 37 Miller et al formula: HR max = 217 - (0.85 x age) Londeree & Moeschberger interactive formula: HR max = 199.1 + 0.119 x AEF4 + 0.112 x AE + 6.28 x EF3 + 3.485 x F2 + 2.468 - 0.0006 x A4 - 0.591 x A A = age; A4 =(age4)/1000; E = exercise type, if run = 1, if bike = 0; if sedentary F2 = 1, otherwise F2 = 0; if active F3 = 1. otherwise F3 = 0; if endurance trained F4 = 1, otherwise F4 =