Liam Hoekstra is only 19 months old but he already has washboard abs and amazing strength. Liam suffers from a rare genetic condition called myostatin-related muscle hypertrophy. The condition promotes above-normal growth of the skeletal muscles; it doesn't affect the heart and has no known negative side effects, according to experts. Liam has about 40 percent more muscle mass than normal and needs a lot of food because of his increased metabolism. "He's hungry for a full meal about every hour because of his rapid metabolism," said his adoptive mother, Dana Hoekstra. "He's already eating me out of house and home." When Liam wants a toy, Liam gets a toy.