What is the AFAA-recommended counting time for heart rate?

The AFAA-recommended counting time for heart rate is 10 seconds because it strikes a balance between accuracy and practicality during exercise settings. In a group exercise class, participants often have varying levels of exertion and may need quick assessments for their heart rates. By counting beats for 10 seconds and then multiplying the result by 6, instructors can efficiently estimate a person's heart rate in beats per minute (BPM).

This method allows for a relatively quick assessment that can be easily performed mid-workout without significantly disrupting the flow of the class, making it suitable for the fast-paced environment of group exercise. Counting for shorter periods, such as 5 seconds, may lead to less accurate readings due to the potential for variability in heart rates during that short duration. Conversely, counting for longer periods like 30 seconds or 1 minute would provide more accurate data but could be impractical in a dynamic setting where quick adjustments to workout intensity may be needed.