Fitness

2. The ability of a muscle to repeatedly exert force against resistance.
5. The ability to perform smooth and efficient movement.
8. The ability to stabilize the body both in movement and stillness.
10. When training stops for prolonged periods of time, gains are lost.
11. The ability to produce a force quickly.
12. The duration of an exercise session.
15. The principle that exercise needs to continually overload the body in order for positive change to continue to occur.
19. The time taken to react to an external stimulus.
20. The principle that the type of exercise must be specific to the desired outcome.

1. The ability of the heart and lungs to deliver oxygen to working muscles during sustained activity.
3. The ratio of body fat to lean muscle mass.
4. The maximum amount of weight that can be lifted in a single effort.
6. The principle that exercise should overload the body in order for a positive change to occur.
7. The ability of muscles and joints to move through their full range of motion.
9. The specific kind of exercise an individual is doing.
13. How often an individual exercises.
14. The ability to quickly and precisely move or change direction without losing balance.
16. The ability to perform actions or cover distance quickly.
17. The principle that all beneficial effects of exercise are reversible if exercise ceases.
18. How hard an individual is working during exercise, often measured by heart rate or perceived exertion level.