We talked about burning calories while swimming and how that can build cardiorespiratory endurance, but what is that and why is it important? “Cardiorespiratory endurance is the ability of your heart, blood vessels, and lungs to deliver oxygen to working muscles,” says Trevor Thieme, C.S.C.S., Beachbody’s senior manager of fitness and nutrition content. In a nutshell, building your cardiorespiratory endurance helps you sustain harder workouts for a longer period of time. To learn more about cardiorespiratory endurance and the difference between cardiorespiratory and cardiovascular, click on the link below.