Final answer:
Adults should perform 150-300 minutes of moderate or 75-150 minutes of vigorous aerobic activities weekly, plus muscle-strengthening activities twice a week, per the 2018 Physical Activity Guidelines for Americans. Incremental activities like housework or taking stairs can also boost activity levels.
Step-by-step explanation:
Physical Activity Recommendations for Different Population Groups
The 2018 Physical Activity Guidelines for Americans issued by the Department of Health and Human Services provide evidence-based recommendations for physical activity to improve health and reduce the risk of chronic diseases. These guidelines suggest that adults should engage in at least 150 to 300 minutes of moderate-intensity aerobic activity, or 75 to 150 minutes of vigorous-intensity aerobic activity per week, or a combination of both. Additionally, muscle-strengthening activities should be done on 2 or more days per week. Simple activities like brisk house or yard work, parking further away from destinations, and taking the stairs instead of elevators contribute to increasing physical activity levels in everyday life.