If you prefer the top row of keys to always behave as standard function keys without holding the Fn key: 1  Choose System Preferences from the Apple menu. 2  Click Keyboard. 3  Click the Keyboard tab if it's not already highlighted.  Select Use all F1, F2, etc. keys as standard function keys.
In brief: Normal heart rate. Resting heart rate means the rate when not exerting effort, such as sitting, standing quietly, or lying down, usually 60-100 beats/min. A fit athlete will have a lower rate than an average person, as low as 40-60 beats a minute. Maximal heart rate is roughly 220- Age in years, Often, it is recommended aerobic exercise should be at 60-80% Maximal for healthy individuals.
Normal Heart Rate Ranges. The normal heart rate for adults generally ranges from 60 to 100 beats per minute. This means your heart normally beats one to two times per second. Calculate your resting heart rate by placing your index and middle fingers on your neck to the side of your windpipe.ormal Heart Rate Ranges. The normal heart rate for adults generally ranges from 60 to 100 beats per minute. This means your heart normally beats one to two times per second. Calculate your resting heart rate by placing your index and middle fingers on your neck to the side of your windpipe.