Question

research what the \heart rate reserve\, in particular, \karvonens heart rate reserve\ is and calculate this rate for the following.

the target intensity is 70% for a person with a heart rate max of 201, and with a resting heart rate of 50 bpm. which of the following answers is the target exercise heart rate for this 70% intensity for the person?

□ 100 bpm

□ 155.7 bpm

□ 201 bpm

□ 500 bpm

Explanation:

Step1: Recall Karvonen's Formula

Karvonen's formula for target heart rate (THR) is \( \text{THR} = \text{Resting HR} + (\text{Max HR} - \text{Resting HR}) \times \text{Intensity} \)
Here, Resting HR = 50 bpm, Max HR = 201 bpm, Intensity = 0.7 (70%)

Step2: Calculate Heart Rate Reserve (HRR)

HRR = Max HR - Resting HR = \( 201 - 50 = 151 \) bpm

Step3: Calculate Target HR

THR = Resting HR + (HRR × Intensity) = \( 50 + (151 \times 0.7) \)
First, calculate \( 151 \times 0.7 = 105.7 \)
Then, \( 50 + 105.7 = 155.7 \) bpm

Answer:

155.7 bpm (corresponding to the option "155.7 bpm")