When is the best time to stretch during an exercise routine?
a. after the warm up
b. before the warm up
c. before each water break
d. after each water break

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases

Dark clothing enables sweat to be evaporated on the skin's surface very quickly. loose light tight