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Across 5. this type of exrercise is such that the heart and lungs can't get enough oxygen to the muscles. 6. an important principle in strength training, where the exercise must be specific to the type of strength required, and is therefore related to the particular demands of the workout. 8. The ability of a muscle or group of muscles to perform repetitive actions over a period of time. 12. The level of intensity you feel your body is exerting during exercise on a scale of 0 - 10. 14. Frequency, intensity, time, type

Down 1. The ability of the heart to provide oxygen to muscles during physical activity for a prolonged period of time. 2. A major training principle which states that the benefits accrued from training will continue only if training workloads are gradually increased. 3. The beats per minute your heart should be beating at during exercise 4. The maximal amount of force a muscle can exert with maximum effort. 7. A machine, usually in the form of a watch, that tracks heart rate during exercise. 9. This type of exercise is great for burning fat and strengthening your heart and lungs. 10. The percentage of your body mass that is not composed of lean muscle, water, bones or vital organs. 11. The range of motion around a joint. This can be increased with stretching and yoga. 13. An example of this is when you want to see results when lifting weights. You have to lift more than your muscles can handle.