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Across 3. involving or requiring free oxygen 7. affecting the heart and blood vessels 9. a particular section of food to improve a persons physical condition 11. oxygen to muscle tissue during increased physical effort 13. bodily or mental exertion for improving and to stay healthy 14. the positions of limbs or the carriage of the body 17. a reverse movement or tendech 19. the ability or strength to continue even whilst fatigued 20. a structure composing the skeleton

Down 1. to draw out or extend a limb or a part of the body to fool extent 2. the fluid that circulates in the principal vascular 4. a colourless and incombustible gas 5. a sugar having several optically different forms 6. engaged in action - work, participation etc 8. rapidity in moving or traveling. 10. in good physical condition and health 12. cells or fibres that produce movement to the body 15. an organ of blood located in the chest between the lungs 16. harm or damage to the body 18. great or marked ability to do or act - strength or might