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.
Top End Sports says that an average healthy 27-year-old man should have a resting heart rate of 71 to 74 beats per minute. The Mayo Clinic says the normal adult resting heart rate range is fairly... Top End Sports says that an average healthy 27-year-old man should have a resting heart rate of 71 to 74 beats per minute.