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.
This maximum rate is based on the person's age. An estimate of a person's maximum age-related heart rate can be obtained by subtracting the person's age from 220. For example, for a 50-year-old person, the estimated maximum age-related heart rate would be calculated as 220 - 50 years = 170 beats per minute (bpm).
Target Heart Rate Your heart rate is one of the easiest measurements to take to determine your level of exertion during exercise. The American Heart Association recommends working in a safe target heart-rate zone between 50 and 85 percent of your maximum heart rate. An 18-year-old boy can find his maximum heart rate by subtracting his age from 220. This would put his maximum heart rate at 202 beats per minute, meaning he should exercise between 101 and 172 beats per minute. An 18-year-old girl can subtract 88 percent of her age from 206, putting her maximum heart rate at 190 beats per minute and her target heart-rate zone between 95 and 162 beats per minute.