What is a deck of cards workout?
A deck of cards workout is a bodyweight training format that uses a standard 52-card deck to decide what you do and how much of it. You assign one exercise to each of the four suits, shuffle, and then flip cards one at a time — each card tells you which exercise to perform and for how many reps.
Because the deck is shuffled, no two sessions are the same and you cannot pace yourself the way you would through a fixed set of rounds. That unpredictability is the whole point: it keeps the intensity honest and stops you coasting.
The format spread through military physical training and has since become a staple of home workouts, CrossFit conditioning and travel training, largely because it needs no equipment at all — just enough floor space and a deck of cards.