Specifically, the quadriceps, hamstrings and gastrocnemius activate to generate knee extension, hip extension, and ankle plantarflexion torques, respectively. The quick transition from braking to propulsion requires all the muscles spanning the knee to exert large forces in a limited time window. This task concurrently accomplishes multiple neuromotor objectives: it decelerates the body center of mass and prepares the body for the subsequent jump, while protecting distal joints (ankle and knee) that could be affected by the impact with the ground (as demonstrated by the natural tendency to decelerate smoothly), as well as using muscles efficiently. The DVJ is a simple motor task that mimics landing and jumping movements performed often by athletes of several sport disciplines. The drop vertical jump (DVJ) task has been used to identify ACL injury risk factors 32- 34, 36. Non-contact ACL tears are associated with highly dynamic motor tasks, such as landing from a jump and pivoting while running 9, 29. Anterior cruciate ligament (ACL) rupture is a common and devastating injury in adolescent and young athletes, and its short- and long-term consequences can be highly detrimental over the life of an individual 3.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |