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Across 3. We ----- more during exercise to help cool us down 8. Your body need extra ------ to help get rid of lactic acid 9. Used when exerting a force in a short, fast burst 10. Exercise which gets your heart rate and breathing rate up 12. You have the right percentage of fat versus muscle 13. This is used when you try to move an immoveable object, or carry a heavy object 14. Build up of L----- acid

Down 1. Your heart and lungs can keep your muscles supplied with Oxygen throughout exercise 2. The muscles start to produce more Carbon dioxide --- as they work harder 4. Repeatedly applying force, over a long period 5. Your muscles can continue to exert a lot of force for a long period 6. you can stretch your muscles without injury 7. you can run quickly 11. strong movements, performed with speed