[supergirthuk]

Might be something he knows about? Bust ribs or old injury? Sometimes if your a big bloke like him the weight of the muscle if your laid in a poor position posturally it can take a time to fully expand and fill your lungs when you first start aerobic exercise. I am sure you noticed the gradual start to his hour with his punch bag. This is intentional. I think he is fit enough and I also think he should have tried to ask for an hour a day with his punch bag for his task.