CanFitPro Personal Training Specialist Practice Test

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What allows the body to change in response to stretching according to the concept of plasticity?

Sleep and rest
Nutritional supplements
Sustained periods of lengthening
High temperatures

The correct answer is: Sustained periods of lengthening

Plasticity is the concept that the body is able to change and adapt in response to certain stimuli. In this case, the stimuli is stretching. Option A, sleep and rest, may help with muscle recovery but it does not directly contribute to the concept of plasticity. Option B, nutritional supplements, may provide extra nutrients for muscle growth but again, it does not directly promote plasticity. Option D, high temperatures, may cause dehydration and fatigue but does not contribute to plasticity. Only sustained periods of lengthening, as seen in option C, directly correspond to the concept of plasticity as it involves stretching the muscles over a period of time in order to see changes in flexibility and range of motion.