Jim Wharton, an exercise physiologist known as "The Mechanic" (for his ability to finely tune athletes), and his son, Phil, a competitive long-distance runner, are the President and Vice President of Maximum Performance International. Their Active-Isolated Stretching technique is taught in fitness centers and clinics around the world. The Whartons are internationally-known personal trainers who have worked with luminaries in the sports world, from professional football players to Olympic gold medalists.
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