ⓘ Active stretching eliminates force and its adverse effects from stretching procedures. Active stretching stimulates and prepares muscles for use during exercise ..

                                     

ⓘ Active stretching

Active stretching eliminates force and its adverse effects from stretching procedures. Active stretching stimulates and prepares muscles for use during exercise. Active stretches not only stretches the muscles and tissues, but prepares the muscles for the action by activating and warming them up.

Before describing the principles on which active stretching is based, the terms agonist and antagonist must be clarified. Agonist refers to actively contracting muscle or muscles while their opposing muscles are termed antagonists.

The neuromechanisms conceptualized by Sir Charles Sherrington 1857 - 1956," the philosopher of the nervous system”, as applied to active stretching are:

  • Muscle spindles - Sensory nerve endings in muscle detect the change in length of the muscle and its rate of change.
  • Reciprocal inhibition - While agonist muscles contract, contraction of the opposing antagonist muscles is inhibited. Such as when alternately flexing and extending ones elbow.

Force applied to a muscle stimulates the muscle spindles which activate protective reflexes resulting in contraction of that muscle. Such as the knee jerk response of neurological testing procedures.

While necessary for sports and ordinary motions, this protective reaction is counterproductive for stretching, i.e., lengthening muscles.

                                     

1. A history of active stretching

  • Sir Charles Sherrington conceptualized the principle of reciprocal innervation circa 1904 and demonstrated it circa 1913.
  • While H. A. DeVries, L. E. Holt and others wandered from this course, P. Williams 1937 utilized procedures for his flexion exercises back program. Peters and Peters 1975 further adapted Sherringtons principles into their program of active stretching’, departing from the popular static stretching designed for specific sports, to address mobility of the entire body.
  • EMG Electromyographic studies by S. Blackburn and others have validated Sherringtons principle of reciprocal innervation. Audiovisual electromyography by Peters and Peters supports Sherringtons principle of reciprocal innervation inhibition and his description of the reaction of muscle spindles’ to force. These two principles are the basis of active stretching’ procedures.
  • A. D. Munrows work proposed these principles for active’ mobilizing exercises. 1962
  • There currently are other stretching methods utilizing active’ components in conjunction with force, the use of which Munrow does not concur.

6. Invented in 1998 By Thomas Sheehan of Columbia University.

                                     

2. Bibliography

Munrow, A. D. PURE AND APPLIED GYMNASTICS. London: Edward Arnold., 1962.

Jean M. Peters & Howard K. Peters THE FLEXIBILITY MANUAL Sports Kinetics Inc. 1995

Blackburn, S. E., L. G. Portney. Electromyographic Activity of Back Musculature During Willams’ Flexion Exercises. PHYSICAL THERAPY, Journal of the American Physical Therapy Association. June 1981.