McLeod syndrome patient Mark Williford of Melbourne, Florida finds water aerobics classes to not only be beneficial to his health, but a source of great joy. Mark swam competitively in high school, and swimming has always been an important part of his life. Most weeks Mark heads to the pool for classes at least twice a week.  The buoyancy of the water supports a portion of his body weight, making it easier to move in the water, improve flexibility, and strengthen his muscles.