Video: Anderson Silva back on the treadmill following leg surgery

Not long after walking down his first flight of stairs (watch it), former UFC Middleweight Champion Anderson Silva is back on the treadmill (via Vine), getting his groove back after a catastrophic leg injury ended his UFC 168 title fight back in December (details). Considering the severity of his leg break -- coupled with the fact that it happened less than two months ago -- "The Spider's" progress has been nothing short of remarkable.