Jessica Rose, an orthopedic surgery professor at Stanford, could not believe her eyes. Tai chi master Chen Xiang, sensor balls taped to key body joints, was demonstrating palm, elbow and fist strikes ...
Maybe it's from watching too many episodes of "Walker, Texas Ranger," but I've always wanted to learn a martial art. So when my sister-in-law invited me to take a tai chi class at her church, I jumped ...
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