When I twisted my knee and strained a ligament, I was told to do exercises to strengthen the muscles around the knee. Apparently strong muscles can make up for

When I twisted my knee and strained a ligament, I was told to do exercises to strengthen the muscles around the knee. Apparently strong muscles can make up for weak ligaments. Maybe strong "concentration muscles" can make up for whatever is weak in a person with ADD. Or, maybe ADD can be defined as a person with weak concentration muscles.