According to the Physical Activity Guidelines for Americans, adults need muscle-strengthening activities on __ or more days a week that work all major muscle groups (legs, hips, back, abdomen, chest, shoulders, and arms).

Causation can be proved by using an

Which factors influence how drinking and binge drinking affect a person? check all that apply. the person’s body size the time of day the person’s gender medications the person has taken whether the person drinks hard liquor or beer

What provides the smooth surface for the movement of bones at joints?