If wrinkles must be written on our brows, let them not be written upon the heart. The spirit should never grow old.
-James A. Garfield

Do 1 burpee, Take 1 deep breath. Do 2 burpees, Take 2 deep breaths. Continue up to 10 and back down to 1.

You can breathe as much as you need during the burpees. This exercise is meant to improve your ability to hold off panic-breathing response and prevent hyperventilation in strenuous exercise.