Question

One method for prescribing exercise intensity (particularly cardiorespiratory exercise) is to use the Karvonen method. Explain the Karvonen method and how it is used to prescribe exercise intensity.

A) Karvonen method utilizes heart rate reserve
B) Calculates target heart rate using only age
C) Determines exercise intensity using duration only
D) Karvonen method is exclusively based on perceived exertion

Answer 1

The Karvonen method calculates exercise intensity using the heart rate reserve, which is determined by subtracting resting heart rate from maximum heart rate, and adding back the resting heart rate after multiplying by the desired intensity percentage.

Step-by-step explanation:

The Karvonen method is a formula used to calculate exercise intensity, especially in cardiopulmonary exercise. It involves using the heart rate reserve (HRR), which is the difference between your maximum heart rate (MHR) and your resting heart rate (RHR). To find the target heart rate (THR) for exercise, the Karvonen method involves the following steps:

• First, calculate the MHR by subtracting your age from 220. This is a generalized formula to estimate an individual's maximal heart rate.
• Second, determine your RHR by measuring your pulse before you get out of bed in the morning.
• Third, calculate the HRR by subtracting your RHR from your MHR.
• Finally, to find the THR, add your RHR to the product of your HRR and the desired intensity percentage. For example, if you're aiming for 60% exercise intensity, you would multiply your HRR by 0.60, then add your RHR to this number.

The THR calculated with the Karvonen method guides the intensity of the exercise to ensure it is within a safe and effective range to achieve cardiovascular benefits.