The hard-core workouts done by contestants on the TV show 'The Biggest Loser' appears to help preserve their muscle mass, a new study has found. Participants typically lose 100 or more pounds--a number that usually includes a significant amount of muscle loss. But researchers who studied 16 season 8 contestants found that the average weight loss was 128 pounds, 81 percent of which was fat loss, while 19 percent was muscle loss. The study's authors say the number is impressive, and that...