4-3 fitness crosswords

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Across
  1. 6. exercise increases your _____
  2. 7. starting with a little and adding to it regularly as you improve is known as?
  3. 9. ____ in fitness is an important part of exercise
  4. 13. what is gradually doing more than normal to improve your performance
  5. 14. term used for those who want to vary their exercise routine
  6. 15. what does aerobic mean?
Down
  1. 1. what is the main benefit from anaerobic exercise?
  2. 2. for improved health you need the principles of overload,_____, and specificity
  3. 3. a diet makes you healthier by itself? (True or false)
  4. 4. work different muscles in your body to gain ____ strength
  5. 5. anaerobic activities benefits are greater than aerobic? (True or false)
  6. 8. ____ exercise increases your lean muscle mass
  7. 10. what is something that improves physical work performance?
  8. 11. activity that have short bursts of energy?
  9. 12. when muscles demand more oxygen than normal is called?