Personal Fitness Professional - June 2008 - (Page 33)

BIOCHEMICAL NEUROLOGICAL and reducing its contribution to movement in any of its potential roles (prime mover, synergist, antagonist, neutralizer). Eccentric lengthening of muscles to decelerate gravitational forces and/or external weight is the way the body signals a concentric contraction to overcome the same forces. Decreased ﬂexibility means a reduced ability for the muscle to eﬀectively load eccentrically, which limits force production. Imagine winding up to throw a ball but not being able to get your arm behind your torso. Your throw would turn in to a “push,” never fully generating the optimal eccentrically loading of the pecs, anterior deltoid or obliques. Strength: When performing corrective exercises for strengthening, we begin by keeping the eﬀort at approximately 60% of the client’s perceived maximum. The reduced eﬀort allows the body to recruit motor neurons from all muscles involved in the movement sequence. The body can then proprioceptively recognize the diﬀerence between their familiar movement patterns and the new one we are attempting to establish. In contrast, higher percentages of eﬀort will require that the body use its most eﬀective (as opposed to eﬃcient) movement strategy. The result is that the client reproduces the undesirable movements patterns we are attempting to correct. Stability: Much of the information the central nervous system (CNS) receives regarding stability for a joint comes from the mechanoreceptors in the joint capsule. Therefore, the quality of the information to the CNS is dependent on the quality of the joint capsule. Joint capsules that have been damaged due to injury or become lax with overuse can negatively aﬀect the quality of the proprioceptive information to the CNS. Force production of a muscle is secondary to the timing of the contraction. For example, if a muscle designed to stabilize the spine against a sheer force contracts at 100% but is 1/10 of a second late contracting, the damage could already be done. This is often the case in joints where the joint capsule has adapted to long-term postural stress, as with thoracic kyphosis. Understanding the Movement Triad and its relevance will provide you with a way to self-audit your decision-making process when choosing exercises. It will require you to think through the three components of the exercise and how those components apply to the client or athlete you are working with. The margin for error is often much smaller when working with clients with musculoskeletal challenges and applying corrective exercises. Applying the Movement Triad to your exercise design increases the eﬀectiveness of your program and reduces the risk of injury. Anthony Carey, MA, CSCS, CES, holds a Masters degree in biomechanics and athletic training and is the owner of Function First in San Diego, California. He is the author of The Pain-Free Program: A Proven Method to Relieve Back, Neck, Shoulder and Joint Pain and the DVDs Corrective Exercise for Powerful Change I and II. For more information and seminar listings, visit www.functionﬁrst.com. ● JUNE-JULY2008 · WWW.FIT-PRO.COM 33 http://www.function?rst.com http://WWW.FIT-PRO.COM

Table of Contents Feed for the Digital Edition of Personal Fitness Professional - June 2008

Personal Fitness Professional - June 2008 Contents Letter From the Editor, Writers To Franchise Or Not To Franchise? Current Controversies Insuring Success Case Study Exercise Spotlights Raising Rates Through Better Session Design Mark Your Calendar The Perfect Ad The Movement Triad Exercise Spotlights Product Profile New on the Market Spotlight: Brian Boyle

Personal Fitness Professional - June 2008

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