Question: What is physical activity?

Answer: Movement that results from contracting skeletal muscles

Question: Gloria is a healthy 25-year-old woman. According to recommendations of the U.S. Department of Health and Human Services, she should perform ________ strengthening activities that focus on major muscle groups at least twice a week.

Answer: 8-10

Question: Which of the following statements is true?

Answer: Aerobic exercise involves rhythmic, sustained contractions of large muscle groups.

Question: Sasha’s weekly exercise program includes stair stepping, stretching, cycling, and lifting weights. Which of these activities is generally classified as a strength (resistance) exercise?

Answer: lifting weights

Question: Which of the following statements is true? again

Answer: Weight lifting and other resistance exercises can increase bone mass.

Question: People who exercise regularly can reduce their risk of ________.

Answer: osteoporosis

Question: Oliver’s weekly exercise program includes stair stepping, stretching, cycling, and squats. Which of these activities is generally classified as a strength (resistance) exercise?

Answer: squats

Question: ________ can be metabolized for ATP production.

Answer: alcohol

Question: Cells release much of the energy stored in macronutrients as ________.

Answer: heat

Question: Muscle cells can use the ________ energy system to obtain energy.

Answer: lactic acid