How long it can take for a sprained knee to heel is dependent upon the severity of the injury and the patients capacity to heal. It could take anywhere from a few weeks to a couple of months for healing to occur.
A knee replacement surgery involves replacing a part of a knee that lost bone mass. There are a number of different knee replacements and they typically take 6 weeks before discomfort goes away and they last from 10 t 20 years.
well, it depends how hard you get hit, a rib injury is a very common injury to have but if you do have a rib injury it will take 5 or 6 weeks for it could heal but whatever you do, do not break your ribs because it will be even more deadly.