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.
To calculate this range, follow the same formula as used above, except change 50 and 70% to 70 and 85%. For example, for a 35-year-old person, the estimated maximum age-related heart rate would be calculated as 220 - 35 years = 185 beats per minute (bpm).The 70% and 85% levels would be: 1  70% level: 185 x 0.70 = 130 bpm, and.or example, for a 35-year-old person, the estimated maximum age-related heart rate would be calculated as 220 - 35 years = 185 beats per minute (bpm). The 70% and 85% levels would be: 1  70% level: 185 x 0.70 = 130 bpm, and.