Which statement about resting heart rate and fitness is true?

Which statement about resting heart rate and fitness is true?

• A. Resting heart rate increases with fitness
• B. Resting heart rate decreases with fitness
• C. Resting heart rate stays the same
• D. Resting heart rate fluctuates daily

Answer: (B)

Resting heart rate is the number of heartbeats per minute when you’re at rest. As you improve cardiovascular fitness through regular aerobic training, the heart becomes more efficient and can pump more blood with each beat (this is a bigger stroke volume). Because each beat delivers more blood, your body doesn’t need as many beats per minute to maintain the same overall blood flow at rest, so the resting heart rate naturally falls. There’s also a shift toward greater parasympathetic (vagal) activity at rest, which further slows the heart. So, the trend with increasing fitness is a decrease in resting heart rate. While you might see small daily fluctuations due to factors like sleep, stress, or caffeine, the long-term effect of better fitness is not an increase or no change, but a lower resting heart rate.

Resting heart rate is the number of heartbeats per minute when you’re at rest. As you improve cardiovascular fitness through regular aerobic training, the heart becomes more efficient and can pump more blood with each beat (this is a bigger stroke volume). Because each beat delivers more blood, your body doesn’t need as many beats per minute to maintain the same overall blood flow at rest, so the resting heart rate naturally falls. There’s also a shift toward greater parasympathetic (vagal) activity at rest, which further slows the heart. So, the trend with increasing fitness is a decrease in resting heart rate.

While you might see small daily fluctuations due to factors like sleep, stress, or caffeine, the long-term effect of better fitness is not an increase or no change, but a lower resting heart rate.