Knee Replacements Double in 10 Years, Study Says - ABC News
It seems to be mostly because of the growing numbers of overweight and obese over the last several decades, plus the desire to stay physically fit by running and other such activities like tennis.
I sometimes worry about my friend who likes to run and play tennis. But I doubt that anything I say will change anything. When it comes to a desire for extreme physical fitness, there are those who are so dedicated they won't heed any warnings.
So we have the overweight and obese on one hand and those who strive for great physical fitness on the other hand.
Arthritis (inflammation) is another cause (worsened by inflammatoy diets, in my opinion).
Your comments are welcome.