Too much variety can be a bad thing… if your class members are training for a specific sport or event. Specificity of exercise describes how a training program's mode and intensity change the performance response. An example of training specificity is:

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Punching a heavy bag mimics the action of boxing and utilizes the same muscles; therefore, it provides a good example of the principle of specificity. While lifting weights, riding a stationary bike, and performing plyometric training are excellent modes of exercise, they may not be specific to a person's fitness and/or performance goals.

Too Much Variety Can Be a Bad Thing… If Your