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.
Resting Heart Rate. The experts at the Mayo Clinic suggest the normal resting heart rate for an adult is between 60 and 100 beats per minute. If you are a healthy adult, the lower your resting heart rate is the better. If you are a trained athlete, your resting heart rate may be 40 beats per minute. However, this is normal because your heart is able to pump blood through your body more efficiently. To make an accurate determination of your heart rate, take your pulse when you are sitting down at rest, not moving or walking.