• Episode 19

    The Genetics of Exercise

    Have you ever had an experience like this: You and a friend start jogging together. Neither of you have been exercising much, but after a few days, your friend is easily striding along as you wheeze, gasp and hold onto your aching side. Do not feel bad about your performance; it may be your genes. Scientists have identified about 200 genes that play a role in our body’s ability to become fitter, referred to as “adaptation to exercise.” Mark Olfert of the University of California at San Diego and Claude Bouchard of the Pennington Biomedical Research Center explain. (Begins at 03:51)
  • Episode 16

    Circadian Rhythm & Jet Lag; Exercise and Appetite

    We start by talking about clocks, but not the type of clock that ticks away on your wall. Instead, we’ll talk about the biological clocks that tick inside us. Clifford Saper of the Beth Israel Deaconness Medical Center will explain some of the research on circadian rhythm and will share his theory about the best way to deal with the disruption of the biological clock caused by jet travel. (Begins at 03:14). And, do you have a tendency to overeat during the holidays? A new study finds that exercise affects the release of two hormones that help regulate appetite. This may help explain why exercise is often, even if briefly, associated with appetite suppression.
  • Episode 11

    Athletic Performance and Caffeine

    Taking caffeine and carbohydrates together following exercise refuels the muscles more rapidly, according to a study conducted by researcher John Hawley with whom we speak in segment one. Segment two (Begins at 12:55) focuses on the discovery of how sugar is absorbed into the small intestine which led to oral rehydration therapy and the development of rehydrating sports drinks such as Gatorade. We talk to the man who made that discovery: Stanley Schultz.