The vastus medialis or VMO is the tear-drop shaped muscle on the inside of the knee. Unless specifically targeted in training, it commonly falls behind in strength compared to the well-developed lateral (outside) muscles.
This exercise will keep the VMO from lagging behind. It's something all athletes should be doing at some point during their workouts. Not doing so leaves them vulnerable to knee problems and future injury, like ACL tears.
What is it about Canada and great strength coaches? For some unknown reason, the Great White North produces some of the world's best coaches and trainers, with Charles Poliquin, Christian Thibaudeau, and Charlie Francis being just a few examples. Now, another young Canadian is beginning to climb into the ranks of the elite: John Paul Catanzaro.