Running

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Across
  1. 2. natural surface for running
  2. 6. a 21.0975-kilometer race
  3. 7. very fast, short-distance run
  4. 8. light exercise before main activity
  5. 9. speed of running measured in time per distance
  6. 11. alternating between fast and slow running
  7. 14. slow activity done after exercise
Down
  1. 1. indoor running machine
  2. 3. endurance or energy for long activity
  3. 4. euphoric feeling after running
  4. 5. number of steps per minute
  5. 7. length of a single step while running
  6. 10. a 42.195-kilometer race
  7. 12. a 400-meter circular running path
  8. 13. slow and relaxed form of running