Column | At 63, he’s a top knee expert. Here’s his exercise routine for strong knees. - The Washington Post - 联众世界

As an orthopedic surgeon, Howard Luks treats aching, aging knees. As a 63-year-old, he also possesses them. Over the decades, his knees have weathered meniscus tears, morning stiffness, thousands of … [+6511 chars]