These findings confirm that while the typical construction of modern-day running shoes provides good support and protection of the foot itself, one negative effect is the increased stress on each of the 3 lower extremity joints. These increases are likely caused in large part by an elevated heel and increased material under the medial arch, both characteristic of today's running shoes. -Running shoes may cause damage to knees, hips and ankles
MY COMMENT: I wouldn't throw away your shoes just yet. It will be interesting to see how the shoe companies respond, if at all.