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.
Many believe that the ideal maximum heart rate for a workout should be about 80 percent of the maximum for your age. In other words, multiply your maximum heart rate by .80 and you'll get the ideal heart rate for a workout, also known as your target maximum heart rate. So for the aforementioned 40-year-old, his target maximum heart rate would be 144 beats per minute, or 180 x .80.