Lunges can be a bitch if you've got knee pain. That is, unless you try this alternative out. The first part is the reverse lunge. Stepping back instead of forward will change the force distribution through the patellar tendon and knee cap substantially. Most of your pain should be gone with this one change....but we go even further. Next step forward but don't remain upright! Lean forward into the sprinter take off position and you'll shift the force to the posterior chain (glutes and hams) inst