You can also follow these steps: 1  Plug your device in to power and connect to the Internet with Wi-Fi. 2  Tap Download and Install. 3  To update now, tap Install. 4  If asked, enter your passcode.ou can also follow these steps: 1  Plug your device in to power and connect to the Internet with Wi-Fi. 2  Tap Download and Install. 3  To update now, tap Install. 4  If asked, enter your passcode.
One simple method to calculate your predicted maximum heart rate, uses this formula: 220 - your age = predicted maximum heart rate. Example: a 40-year-old's predicted maximum heart rate is 180 beats/minute. There are other formulas that take into account the variations in maximal heart rate with age and gender.
Maximum workout heart rate =. (220 - age) X percent of maximum heart rate. (220 - 24) X .60 = 117. (220 - 24) X .80 = 157. According to this formula, Devon should maintain a target heart rate between 117 and 157 bpm to reach 60 to 80 percent of maximum heart rate while working out.ormula 2:Maximum workout heart rate, adjusted for resting heart rate = (220 - age-resting heart rate) X percent of maximum heart rate + resting heart rate (220 - 24 - 65) X .60 + 65 = 144 (220 - 24 - 65) X .80 + 65 = 170. Alice!