I stole a routine from Peter Attia I execute once a week. It's essentially his "Zone 5" workout. It consists of 4 minutes of high intensity cardio followed by a 4 minute rest. Repeat this 4 - 6 times. I use a bike but you can modify. Doesn't sound like much and if you add up the working units its only 20 minutes of exercise. All I can say is try it...And give it 110%. test I have done it once a week for the past 3 weeks. It's brutal. And after round 1, not only do I