Across
- 2. The system involving the heart and lungs during exercise
- 4. Exercise performed at a constant intensity
- 7. Exercise that uses oxygen to produce energy over long periods
- 8. Primary energy source used by muscles
- 10. The body’s response to repeated exercise stress
- 11. Gas required for aerobic energy production
- 14. Feeling of tiredness during prolonged exercise
- 15. Light activity done before exercise to prepare the body
- 16. Structures that transport blood throughout the body
- 17. Highest heart rate achievable during exercise
- 18. A planned schedule of exercise sessions
- 20. Time needed for the body to repair and adapt
- 22. Alternating periods of high and low intensity exercise
- 23. Gradually increasing exercise demands to improve fitness
- 24. Organs that exchange oxygen and carbon dioxide
- 25. Cell structures where aerobic energy is produced
Down
- 1. The ability to sustain physical activity over time
- 3. Organ responsible for pumping blood during exercise
- 5. How long an exercise session lasts
- 6. The maximum amount of oxygen the body can use during exercise
- 9. Desired heart rate zone during aerobic exercise
- 12. How often exercise is performed
- 13. Movement of blood through the body
- 19. How hard the body is working during exercise
- 21. Light activity performed after exercise to return body to rest