Question

the physical activity guidelines for americans 2018 recommends that children engage in ______.

○ 60 minutes of moderate-intensity exercise on at least 5 days a week
○ vigorous-intensity aerobic physical activity at least 40 minutes a day
○ muscle- and bone-strengthening physical activity on at least 3 days a week
○ aerobic physical activity at least 10 minutes a day

Explanation:

The Physical Activity Guidelines for Americans 2018 for children (ages 6 - 17) recommend that they engage in 60 minutes or more of moderate - to - vigorous - intensity aerobic physical activity daily, and also do muscle - and bone - strengthening physical activity (like weight - bearing exercises) on at least 3 days a week. Let's analyze each option:

• Option 1: The guideline is 60 minutes (or more) of moderate - to - vigorous - intensity aerobic activity daily, not "on at least 5 days a week", so this is incorrect.
• Option 2: There is no recommendation of "at least 40 minutes a day" of vigorous - intensity aerobic activity. The aerobic activity can be moderate or vigorous, and the total is 60 minutes daily, so this is incorrect.
• Option 3: This option about muscle - and bone - strengthening physical activity on at least 3 days a week matches the guidelines.
• Option 4: The aerobic activity recommendation is 60 minutes (or more) daily, not at least 10 minutes a day, so this is incorrect.

Answer:

C. muscle - and bone - strengthening physical activity on at least 3 days a week