There are four components of physical fitness: cardiorespiratory fitness, musculoskeletal fitness (divided into muscular strength and muscular endurance), flexibility, and body composition.

Choose the statement below that correctly describes a component of physical fitness.

Flexibility can be achieved through exercises with slow, controlled movements like yoga and stretching.
To improve muscular strength, an individual would use lighter weights for more repetitions.
Resistance training is the only form of exercise that improves body composition.
Examples of appropriate activities to improve cardiorespiratory fitness include weight lifting and other resistance training.
Recommendations for the type and amount of physical activity have been released by the Surgeon General, the Institute of Medicine (IOM), and the United States Department of Health and Human Services (HHS).

Complete the sentence about Physical Activity Guidelines for Americans, published by the Department of Health and Human Services in 2008.

Physical Activity Guidelines for Americans recommend that Americans should _____________.

a. engage in physical activity for 30 min most days of the week
b. engage in at least 150 min of moderate-intensity aerobic activity per week
c. perform muscle-strengthening exercises at least twice a week
d. be active for 60 min per day to maintain a healthful body weight
e. avoid inactivity