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.
For most adults, normal heart rate is 60 to 80 BPM. Well-trained athletes can have a normal heart rate of 40 to 60 BPM. When you work out, your heart rate will get higher. This is called your active heart rate. Active heart rates, like resting heart rates, differ in people and change as you age. Generally, a healthy active heart rate is 60 to 80 percent of your maximum heart rate, or the highest your heart rate should safely go.