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.
Standing time ranged from immediate to 10 minutes with 1-4 minutes being the most common. In addition, some investigators have assessed blood pressure at two time periods (at 1 and 3 minutes) after standing. Although some OH studies included heart rate (HR) as an assessment parameter, others did not. The measurement of HR along with blood pressure can aid in differential diagnosis.