What is the target heart rate range for a 40-year-old female with a resting heart rate of 60 bpm and a maximal heart rate of 180 bpm using the Karvonen formula?

To determine the target heart rate range using the Karvonen formula, it's essential to start with a few key values: the resting heart rate, the maximal heart rate, and the desired exercise intensity. In this scenario, the resting heart rate is 60 beats per minute (bpm), and the maximum heart rate is provided as 180 bpm.

First, calculate the heart rate reserve (HRR) by subtracting the resting heart rate from the maximal heart rate:

HRR = Maximal Heart Rate - Resting Heart Rate

HRR = 180 bpm - 60 bpm

HRR = 120 bpm

Next, the target heart rate can be calculated by determining the desired intensity of exercise, which is typically expressed as a percentage of the heart rate reserve. For moderate to vigorous exercise, a common intensity range is between 50% and 85%.

Now, applying the Karvonen formula, the target heart rate at two different intensity levels can be found. For example, let’s calculate for 65% (moderate intensity) and 75% (vigorous intensity):

1. For 65% intensity:

Target Heart Rate = (HRR × 0.65) + Resting Heart Rate

Target Heart Rate