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.
Your heart rate has to be 80% of your age adjusted max. Your age adjusted max is 220 minus your age for men, 208 minus 82% of your age for women. The easy way is 220 minus your age, take away 20%.To be in the optimal cardio range, your heart rate has to be at 80% of your age adjusted cardio max. Even better if it is at 100%.our heart rate has to be 80% of your age adjusted max. Your age adjusted max is 220 minus your age for men, 208 minus 82% of your age for women. The easy way is 220 minus your age, take away 20%.