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 resting heart rates ranges anywhere from 40 beats per minute up to 100 beats per minute. Ideally you want to be between 60-90 beats per minute, with the average resting heart rate for a man being 70 beats per minute, and for a woman 75 beats per minute. During exercise, your heart rate will depends on the intensity of exercise, your fitness level, and your maximum heart rate (which will depend on your age).