Laziness May Be Genetic

New research might help explain why some people have trouble getting off the couch. Experiments on rats suggest there could be a genetic predisposition to laziness. A group of scientists put rats in cages with running wheels -- a subtle suggestion for them to start exercising -- and recorded how much time each spent running during a six-day period. They then bred the top 26 runners with each other and paired up the 26 laziest rats. This selective breeding process was repeated through 10 generati...