fitness

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Across
  1. 3. you gradually make your exercise harder
  2. 5. can be increased by swimming running and biking
  3. 6. can increase your flexibility
  4. 7. is frequency, intensity, time, type
  5. 8. is hight interval time training
Down
  1. 1. working more often and harder
  2. 2. is a slow movement exercise to raise heart rate
  3. 4. you must do specific exercises to improve specific parts