When I was 18 years old a car jumped the curb and slammed into my right knee. It was badly bruised and swollen to twice its size. Once the swelling went down the therapist said to sit in a straight back kitchen chair and slowly raise my foot off the floor as high as possible. Keep that up as long as needed to be able to once again resach my chin with that knee. It took several months but I was finally able to.
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Take a peek at my BLOG:

http://charleen-micheles.blogspot.com/