Paul Katami's newest interval challenge will leave you breathless. Start by learning 5 exercises then run them for intervals of 50 seconds on and a quick 10 second transition in between. During your recovery round learn 5 more exercises and run them for 50 second intervals. Finish by stacking all 10 exercises and running them all for 50 second intervals TWICE! This workout is smart and efficient and is designed to incorporate cardio and conditioning at a high intensity so you can blast through barriers using power, endurance and strength.