I have a 10 mile commute to and from work. On the way I go at a very sedate pace, as there's no shower available, but on the way home I "go for it" a bit more. Its a fairly hilly route, and not one that lends itself too much to detours. I am wondering which will shift my gut most effectively: a) Going hell for leather all the way, and arriving absolutely creased in 30 minutes or b) Aiming for a lower heartrate and effort, and dragging the ride out to 40 minutes (still hilly remember, so not a doddle!) Please don't tell me to go twice the distance - I enjoy the ride, but the lure of home is soooo strong!