![]() ![]() The amortization phase is the time delay between overcoming the negative work of the eccentric pre‐stretch to generating the force production and accelerating the muscle contraction and the elastic recoil in the direction of the plyometric movement pattern. ![]() This phase is also frequently referred to as the electro‐mechanical delay phase of plyometrics. Authors of this manuscript prefer to use the term “ time to rebound”. The term amortization has been developed to describe the time from the cessation of the eccentric pre‐stretch to the onset of the concentric muscle action. Therefore, the purpose of this clinical commentary is to provide an overview of plyometrics including: definition, phases, the physiological mechanical and neurophysiological basis of plyometrics, and to describe clinical guidelines and contraindications for implementing plyometric programs. Of the numerous types of available exercises, plyometrics assist in the development power, a foundation from which the athlete can refine the skills of their sport. The concepts of specificity of rehabilitation and the SAID (Specific Adaptation to Imposed Demands) principle imply the need for periodization programs to be incorporated in the terminal phases of rehabilitation, as well as conditioning and performance programs. As tremendous forces are imposed on the extremities during sports and athletics, there is a huge demand to develop power during the performance phase of rehabilitation. Plyometrics may be incorporated as an integral component of an exercise program that can produce all the aforementioned outcomes. Because of this there is an increasing demand to progress performance as quickly as possible. Sports physical therapists strive to prevent injuries, rehabilitate injuries in a timely manner in order to rapidly return athletes back to activity, improve the strength and conditioning of athletes, and facilitate the specificity of sports performance. An important part of performance‐based rehabilitation programs is the development of power often addressed by using plyometric exercises. Regardless of the purpose of the program, whether it is used in the terminal phases of rehabilitation, 1 for strength and conditioning, or for performance enhancement, plyometric exercise should play an integral part of the program. Rehabilitation programs have dramatically changed over the past several years. There are as many strength and conditioning programs as there are individual clinicians developing the programs.
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