12. How does regular exercise improve cardiovascular function during
times of stress?
A. It reduces carbon dioxide supplies and raises
triglyceride levels.
B. It increases oxygen supplies and lowers
triglyceride levels.
C. It reduces the amount of endorphins released
in the body
D. It increases the level of hormones circulating
in the body.

What are the components of an effective weight-training program? a. conditioning, progression, generalization, overwork, balance, and recovery b. overload, progression, specificity, regularity, recovery, balance, and variety c. overwork, coordination, motivation, conditioning, regularity, and variety d. consistency, progression, rest, regression, balance, and specificity