But Metzl said that extreme exertion—i.e. burpees—release endorphins, which give us the boost we need to get through our day.

AMRAP (As Many Rounds As Possible): Set a timer for 2 to 5 minutes and go for max burpees. Focus on consistency, not sprinting. Most people blow up in the first 20 reps. Your goal? Smooth and steady.