How does training affect performance?

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Across
  1. 3. range through which joints and body parts are able to move
  2. 6. by product of the incomplete breakdown of CHO in the absence of oxygen
  3. 7. training that uses the aerobic energy system as the main source of energy
  4. 12. number of heartbeats/minute while at rest
  5. 13. the lowest level at which we can train and still make some fitness gains
  6. 17. amount of blood ejected by the left ventricle during a contraction
  7. 19. ability of a muscle or muscle group to exert a force against a resistance
  8. 21. principle that implies that greatest gains occur when training resembles competition movement
Down
  1. 1. in the absence of oxygen
  2. 2. ability of working muscles to use the oxygen being delivered
  3. 4. apply resistance without changing muscle length
  4. 5. training that incorporates high intensity work with limited recovery
  5. 6. point at which lactic acid accumulates rapidly in the blood
  6. 8. generally is the use of free weights to lengthen and then contract muscle fibres
  7. 9. implies that gains in fitness occur when training load is progressively increased as improvements occur
  8. 10. referred to as the "detraining effect"
  9. 11. measures the energy value of food
  10. 14. process of restoring ATP to its former state
  11. 15. process of breaking down glucose to produce energy
  12. 16. the amount of air the lungs can hold
  13. 18. in the presence of oxygen
  14. 20. glucose stored in the body. Used for fuel when blood glucose levels decline