Whether you love or loathe long workout sessions, you may be able to blame it on your parents. A study published on the Web site of the Proceedings of the Royal Society B in September 2010 revealed that the desire to exercise is a heritable trait passed down through generations. Beginning in 1993 with 224 mice, University of California, Riverside, researchers were able to create “high-running” mice by selectively breeding the males and females of each generation that spent the most time each day voluntarily running on the wheels attached to their cages. The researchers conclude that there are genes promoting activity, and they theorize that drugs could be developed that make it more pleasurable to work out and/or less pleasurable to sit still for long periods. To which we can only say one thing: Have they not heard of Red Bull?