What is a tempo run?

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  1. #formula
  2. #threshold
  3. #about
  4. #tempo
  5. #daniels
  6. #coach
  7. #anaerobic
  8. #lactate
  9. #running
  10. #according
  11. #current
  12. #known
  13. #seconds
  14. #slower
  15. #popularized