The workout is called 20 20 and is done on the heavy bag. Try to time yourself and get it done in 3 minutes or less. It consists of
20 straight punches, 20 uppercuts, 20 squats
20 straight punches, 20 uppercuts, 20 jumping lunges
20 straight punches, 20 uppercuts, 20 push-ups
20 straight punches, 20 uppercuts, and 20 burpees
Do this at the end of your boxing routine