Question

1. as a person gets older, their maximum heart rate will... *

○ get lower.

○ get higher.

○ stay the same.

○ there is not enough background information.

Explanation:

Maximum heart rate (MHR) decreases with age due to physiological changes like reduced cardiac muscle elasticity and slower electrical conduction in the heart. A common formula for MHR is $220 - \text{age}$, which shows a linear decrease as age increases.

Answer:

A. get lower.