Final answer:
The recommended weekly duration for moderate-intensity aerobic activity for additional health benefits is at least 150 to 300 minutes, dispersed throughout the week, as advised by the 2018 Physical Activity Guidelines for Americans.
Step-by-step explanation:
For additional health benefits, adults should perform moderate-intensity aerobic activity for at least 150 minutes (2 hours and 30 minutes) to 300 minutes (5 hours) per week. This exercise recommendation is supported by the 2018 Physical Activity Guidelines for Americans issued by the Department of Health and Human Services (HHS), which suggests that moderate-intensity activities should allow a person to talk, but not sing, during the activity. It’s important to spread this activity throughout the week, and incorporating muscle-strengthening activities on 2 or more days can provide additional health advantages such as increased muscle strength and bone density.