Mice are less susceptible to the flu when they eat quercetin, a substance that occurs in fruits and vegetables. Researcher J. Mark Davis will talk about his study on stressful exercise, quercetin and the flu. Click here for the study. (Begins at 3:55)

In the wake of the summer Olympics, we asked Rick Lieber, of the University of California San Diego and the VA Medical Center San Diego, if the muscles of highly trained athletes could get much stronger and whether gene therapy, which is being developed for medical applications, could be used by to enhance performance in the future. (Begins at 12:56)

The Buzz in Physiology gives a quick look at a study that finds a possible link between your genes and activity level. And we detail a study on the benefits of hydrogen sulfide gas. We also talk to APS member Jim Hicks of the University of California Irvine about his involvement with the film, Wall-E. (Begins at 1:20)