Describe how to determine your maximum heart rate and why heart rate is important to monitor while exercising.

Answer:

Estimate your maximum heart rate by subtracting your age from 220. For example, a 20-year-old would have an estimated maximum heart rate of 200 beats per minute. Monitoring your heart rate while exercising helps you judge how hard you are working, stay within an appropriate intensity or target zone, and avoid overexertion. This estimate is general, so individual needs and medical advice should also be considered.