Does HIIT really work?

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Tags

  1. #muscle
  2. #known
  3. #aerobic
  4. #maximum
  5. #training
  6. #intensity
  7. #build
  8. #shorter
  9. #fitness
  10. #lower
  11. #alternate
  12. #period
  13. #seconds
  14. #minutes
  15. #interval
  16. #increase
  17. #workouts
  18. #between
  19. #effort