When a person has arthritis or knee injury, particularly the osteoarthritis, damage, inflammation, and pain can limit his/her ability to extend
https://gomedii.com/blogs/english/wp-login.php?action=logout&redirect_to=https%3A%2F%2Fgomedii.com%2Fblogs%2Fenglish%2F&_wpnonce=42cbf31415