Karvonen Formula for Mabel                 220         - 72         Age = 148         Maximum Heart Rate - 63         Resting Heart Rate = 85   = 85   Heart-Rate Reserve X .4 X .75 Training Heart-Rate Range = 34   = 64       + 63   + 63   Resting Heart Rate     = 97   = 127   Target Heart-Rate Zone   Note: Numbers are rounded up to the nearest whole number