Is 3 days of exercise a week enough?

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Tags

1. #minutes
2. #three
3. #least
4. #exercise
5. #strength
6. #aerobic
7. #weight
8. #vigorous
9. #spend
10. #times
11. #doing
12. #twice
13. #amount
14. #engage
15. #cardiovascular
16. #workout
17. #healthy
18. #increase
19. #adult
20. #training
21. #recommendations
22. #should