How is the target heart rate calculated during exercise?

To calculate the target heart rate during exercise, the correct method involves determining the maximum heart rate and then adjusting it based on the desired intensity of the exercise. The maximum heart rate is generally estimated using the formula: 220 minus your age.

Once you have the maximum heart rate, you calculate the target heart rate by multiplying that number by the desired intensity level (expressed as a decimal). This approach ensures that the target heart rate is tailored to the individual's age and fitness level while promoting effective cardiovascular training.

For example, if a 30-year-old is aiming for an exercise intensity of 70%, you would first calculate their maximum heart rate (220 - 30 = 190 bpm) and then determine the target heart rate by multiplying 190 by 0.7, which equals 133 bpm. This process effectively guides individuals toward exercising at a safe and beneficial intensity.

The other options do not correctly represent the established approach for calculating target heart rate based on age and desired intensity.