As the new year approaches, many people (epidemiologists included!) will resolve to begin exercising more. Making a renewed commitment to exercise is among the most common New Year’s resolutions. Although almost everyone knows they should be exercising, there is a lot of confusion about how much exercise we really need to stay healthy. Does the amount or type of exercise you need depend on whether you’re exercising to lose weight or exercising to stay healthy? Should you be adding a fitness tracker to your gift list? Are you ever ‘too old’ to lift weights? In this episode, new host Bryan James is joined by Hailey Banack to explore these, and other, interesting topics with physical activity expert Dr. Peter Katzmarzyk of the Pennington Biomedical Research Center.