I guess he just means running at his optimum speed, not his maximum. So he would slow down during that 3 minutes, but would be busting a gut trying NOT to slow down. Still very painful. Also 300 sit-ups in a set is impossible. He either isn't doing them properly or this is a typo. 99% of people don't perform sit-ups properly - i've very rarely seen anybody do them properly. I built up to do 100 sit-ups in a set, until i looked in to it and realised a REAL sit-up is a whole different ball game. When i changed technique at first i could only do 10, now its 25. Can't imagine anybody with abs strong enough to do 300. Also as somebody has said, 300 sit-ups would be utterly pointless anyway.[/quote]

sorry, typo of my own. Should read 3 miles.