Renowned exercise physiologists Martin Gibala and Stuart Phillips of McMaster University teach the surprising new science of cardio fitness and strength-building—and then provide you with hacks to get fit and strong (and healthy!) in less time than you ever thought possible. What’s the right mix of exercise between cardio and strength? How do you know if you’re working out hard enough? What’s better, heavy or light weights? These questions and more are addressed through a course designed to provide even the most inexperienced of exercisers the tools you need to design time-efficient workouts that can be done virtually anywhere, from your own home to a city park or even at your workplace.