A 12-minute AMRAP: a single countdown over twelve minutes. You repeat your chosen circuit as many times as you can while the clock runs, counting your rounds, until it reaches zero.
The shorter cap is a sharper test than the classic twenty: less time to recover means a higher sustainable pace and a faster, more intense piece. It suits a tight bodyweight circuit or a couple of movements you can keep moving on without long breaks. The timer is a single countdown; you supply the circuit. Open it in the editor to change the cap.
As many rounds as possible in twenty minutes. Pick your circuit, press start, keep moving.
The CrossFit benchmark: three rounds of five one-minute stations with no rest between them, a minute of rest between rounds. Count every rep and calorie for your score.