This article is a draft concerning sport.
You can share your knowledge by improving it (how?) as recommended by the sport project. Vertical relaxation during a volleyball smash
Vertical relaxation is the ability to lift one's center of gravity vertically using only one's muscles. It measures an athlete's ability to climb from a still position.
Very useful in sports such as basketball or volleyball, it develops through very simple exercises like skipping rope or climbing stairs.
wiki
