tumbling

The most dynamic part of Sports Acrobatics, performed on a 25 meter sprung track by both Men and Women.
There are three tumbling runs:  

* Somersaults 

* Twisting Somersaults  

* Combined 

Tumbling is performed on elevated spring runways that help tumblers propel themselves higher than a basketball goal as they demonstrate speed, strength and skill while executing a series of acrobatic maneuvers. Top-level contenders will perform explosive somersaults with multiple flips and twists.
Text taken from
www.usa-gymnastics.org