How can regular physical activity benefit the health of the heart? A. It will keep the heart from working too hard.

B. It avoids putting disease causing chemicals in the body.

C. It will help to keep blood pressure within range.

D. It will strengthen the heart muscle.

B

Because regular exercise helps your body tissue do a better job at pulling oxygen from your blood which will allow you to work better under stress and you don't get winded as easily.

source: Kaiser Permanente

answer; (b) i believe its metabolic rate of the patient; plz check first