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Developing Cardiorespiratory Fitness
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The article provides a complete overview for fitness routines. Explain the second principle of training, and the balance one needs to find
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Answer 1

Answer:

The second principle of training is "Intensity." Intensity is basically the level of difficulty an exercise is. The balance one needs to find during a workout is important to burn energy and prevent any injury. One way an individual can find a good balance is by determining their heart rate. It is important to stay inside that zone.  

Explanation:

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