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16-September-2008 16:15:14 - stretching Stretching Source: Active stretching Passive stretching Motion: Static stretching Dynamic stretching Ballistic stretching Active stretching eliminates force and its adverse effects from stretching procedures. 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: Reciprocal innervation - While agonist muscles contract, contraction of the opposing antagonist muscles is inhibited. Such as when alternately flexing and extending one's elbow. Muscle spindles - Sensory nerve endings in muscle detect the change in length of the muscle and its rate of change. 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. A history of active stretching Sir Charles Sherrington conceptualized the principle of reciprocal innervation circa 1904 and demonstrated it circa 1913. A. D. Munrow's work proposed these principles for 'active' mobilizing exercises. 1962 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 Sherrington's 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 Sherrington's principle of reciprocal innervation. Audiovisual electromyography by Peters and Peters supports Sherrington's 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. 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. This method has been called the revised version of active stretching and involves bands that can be found at Bally Total Fitness! 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. See also PNF stretching Resistance stretching Retrieved from http://en..org/wiki/Active_stretching Categories: Exercise Views Article Discussion this page History Personal tools Log in / create account Navigation Main page Contents Featured content Current events Random article Search Go Search Interaction Community portal Recent changes Contact Donate to Help Toolbox What links here Related changes Upload file Special pages Printable version Permanent link Cite this page This page was last modified on 10 August 2008, at 15:27
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