Why I run funny Bonnie Berkowitz reports: Max Prokopy, director of the SPEED Clinic, thinks my stride probably began going downhill 11 years ago, after I broke my right ankle in a fall. Here's what is going wrong, and what he says I can do about it: Right ankleIt healed nicely but is too stiff to allow the Achilles tendon to stretch and snap back properly, so I'm not getting as much power from it as I once did. Leaning into a proper running stride is also more difficult. THE FIX: Pre-run stretches to open up the ankle joint; form drills to get used to the correct lean. Right knee and right footThe stiff ankle forces my knee to bend inward as my body passes over it. That wastes energy because it's propelling me left rather than forward, and it makes my foot fling out to the side.THE FIX: Nothing specifically for the knee, because it is at the mercy of the joints above and below it. A more mobile ankle and stronger glutes should keep my knee aligned and reduce the foot-flinging. GlutesToo much sitting Has turned these large muscles into passive observers when they should be stabilizing my hips and powering my stride.THE FIX: Pre-run exercises to wake up my glutes before I run, and drills to strengthen them and teach them to do their fair share. Also, less sitting! Lower backBecause my glutes just sit there, my back arches too much to try to pull my legs forward with each step.THE FIX: My back will be under less stress once the rest of my core functions prop-erly. Core exercises such as planks and standing on one leg help stabilize the entire chain. Using stairs to stretch the Achilles tendon. Working at a standing desk helps keep hips from getting tight. The plank. Standingon one leg. Achilles tendon

GRAPHIC: Bonnie Berkowitz and Patterson Clark. Published Aug. 18, 2014.