Group Exercise Instructor Free Test Prep

Category - ACSM Group Exercise Instructor Practice Test

The contract-relax stretching technique applies the principle of reciprocal inhibition. Which of the following BEST defines this principle?
  1. Activation of muscles on both sides of a joint simultaneously will cause an overflow cascade of muscle recruitment
  2. Activation of muscles on both sides of the body simultaneously will cause an overflow cascade of muscle recruitment
  3. Activation of a muscle on one side of a joint will cause inhibition of the muscle on the opposite side of the joint
  4. Activation of a muscle on one side of the body will cause inhibition of the same muscle on the opposite side of the body
Explanation
Answer: C - Reciprocal inhibition is defined as the principle that activation of a muscle on one side of a joint (i.e., the flexor muscle) will cause inhibition of the muscle on the opposite side of the joint (i.e., the extensor muscle). Typically, when performing a contract-relax stretch, the instructor will cue the participant to maximally contract a muscle for a period of time by pushing against an external force provided by the instructor. After relaxation of that muscle group, the instructor then passively stretches the muscle further than would have been possible prior to the technique (thus the saying, “after a maximal contraction comes maximal relaxation”).
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