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.
Determining normal heart rates by age depends solely on how in-shape you are, physically. That means how well your lungs and heart work when you're exerting yourself, according to the American Heart Association. For anyone over about 16 years, including seniors, a normal heart rate is between 60-100 beats per minute when youâre at rest. For well-trained athletes it drops to 40-60 beats per minute, regardless of age, the AHA says.