This is a follow up to the piece I wrote a couple of days ago on the Sport Performance Facebook page: 'the devil is in the detail'. (https://www.facebook.com/sportperformancenz/posts/1422401074549537)
The video below involves two girls performing plyometric hops between low boxes. The first girl is an advanced young athlete, while the second is seeking to develop her basic movement skills. The contrast between them highlights critical elements of quickness (and running efficiency generally): short ground contact time and high chain stiffness. Stiffness in the ankles, knees, and hips allow the body to effectively recycle gravity to achieve the ultimate outcome of high vertical motion of the body. This reduces time spent on the ground and permits a long, powerful stride. Less time on the ground permits speed across the ground but it also reduces the energy cost of running - the goal of distance running.
I will post another video shortly concerned with selecting the appropriate bounce/ jump height.
plyometrics: short ground contact and stiffness
No comments:
Post a Comment