Its not a full contact sport...but running or jogging is a high impact sport. Especially on your feet, knees, and hips.
Some researchers believe runners have moved away from the "right" kind of footfall that our bodies were designed to have.
They have developed a new kind of shoe so runners can put their best foot forward.
In the Technology Spotlight, Cyle Sage with the "On" running shoe company--a Cade Prize semi-finalist--tells TV 20's David Snyder how a "cloud" is involved.