Aerobic exercise can lead to an increase in
a. the number and size of coronary arteries feeding the heart.
b. exercise-related injuries.
c. bone loss related to repeated joint stress.
d. ldl cholesterol levels.

How does drinking alcohol or using drugs put a person at risk for hiv infection? a.they improve judgment, which makes it more likely for people to engage in risky behavior. b.they impair judgment, which makes it more likely for people to engage in risky behavior. c.they impair judgment, which makes it less likely for people to engage in risky behavior. d.they improve judgment, which makes it less likely for people to engage in risky behavior.