However, because many athletes practice within a limited time, it is difficult to perform SS for more than 180 seconds for each muscle. These data suggest that SS for 20 seconds used as a part of a warm-up routine does not change muscle-tendon unit stiffness and may not be able to prevent injury as well. examined the influence of SS for 20 seconds in gastrocnemius muscle on shear elastic modulus, which is an indicator as a passive property of the muscle measured by using shear wave elastography, and showed the shear elastic modulus did not change after the stretching. reported that 20 seconds of SS in hamstrings does not change muscle-tendon unit stiffness. However, previous studies reported the duration of SS used as a part of a warm-up routine is approximately 20 seconds. examined the duration of SS needed to decrease muscle-tendon unit stiffness of hamstrings, and they showed that three minutes of SS was needed to decrease the stiffness. The effects of SS on muscle-tendon unit stiffness is affected by its duration and intensity. Therefore, SS used as a part of warm-up routine decreases muscle-tendon unit stiffness and could lead to preventing injuries. Many previous studies reported that SS decrease muscle-tendon unit stiffness effectively. In the case of insufficient muscle-tendon unit compliance, the demands in energy absorption and release may rapidly exceed the capacity of the muscle-tendon unit, which may cause a higher risk of injuries.
suggested that a sufficient level of muscle-tendon unit compliance is needed for sports utilizing a stretch-shortening cycle to effectively store and release a high amount of elastic energy. Previous studies reported that muscle-tendon unit stiffness is related to the occurrence of muscle-tendon injuries.
An increase in the passive torque during the passive joint movement indicated that the subjects received higher force without pain, which indicates that an increase of tolerance is obtained. ROM is defined as one at which the subject is able to have a maximally tolerable angle without pain. On the other hand, tolerance for stretching is measured by peak passive torque during passive joint movement. The passive property of the muscle-tendon unit is measured by using muscle-tendon unit stiffness, which is calculated from the slope of the torque-angle curve during passive joint movement. However, it is pointed out that the passive property of the muscle-tendon unit and tolerance for stretching influences ROM. Previous review studies reported that SS increases ROM effectively. Static stretching (SS) is commonly used as a part of a warm-up routine in order to increase range of motion (ROM) and potentially prevent injuries.
0 kommentar(er)
