Stress often causes muscles to
a. contract and tighten.
b. bruise more easily.
c. resist exercise.
d. increase in pain.

The answer is letter A.

Stress often causes the muscles to contract and tighten. This happens because relatively high amounts of hormones that are stress-related are released in the blood. This then causes the muscles to contract and tighten causing cramps and uncomfortable feelings in an individual. Stress-related stimulus that occurs mostly within the brain, triggers a response in the muscle contractions causing it to excessively contract and tighten. An individual is suggested to perform deep breathing exercises and stretches to reduce the tightness in the muscles and to calm the nerves to return to its normal state.

The answer is d. worthless