WebMD—October 21, 2010
“When we walk, when we go up and down stairs, or get into or out of a chair or car, we can put three to five times our body weight, and sometimes more, on the joints,” says Geoffrey Westrich, attending orthopedic surgeon and Director of Joint Replacement Research at Hospital for Special Surgery in New York. “So if you’re 50 pounds overweight, you’re putting around 250 pounds of increased stress across your knees and hips.”
Over time, that extra weight makes you much more prone to developing arthritis and can cause arthritis to progress much more rapidly, leading to much more pain once it has developed.
Fortunately, the same principle works in reverse. “For every pound people lose, they lose 3 pounds of stress across their knee and 6 pounds of stress on their hip, on average,” says Westrich.
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