The Surprising Truth About Exercise, Calories, and Weight Loss with Dr. Eric Trexler
How does the body respond when we increase physical activity while trying to lose weight?
In this episode of the Discover Strength Podcast, Luke Carlson is joined by Dr. Eric Trexler of Duke University to discuss one of the most important and provocative areas of exercise science: constrained total energy expenditure.
Dr. Trexler explains the difference between the traditional “additive” model of energy expenditure and the constrained model, which suggests that the body can compensate for increases in physical activity by reducing energy expenditure elsewhere.
The conversation explores what this compensation can look like—from changes in subconscious movement and resting metabolism to changes that occur during sleep—and why the effect may be particularly pronounced when exercise is combined with caloric restriction.
Luke and Dr. Trexler also discuss what this research means for cardio, weight loss, physique athletes, and resistance training. Perhaps most importantly, they examine how we should think about the purpose of exercise when weight loss is not the best measure of its value.
This episode offers a fascinating look at the complex ways the human body regulates energy—and why better expectations about exercise may ultimately help us stay active for the long term.