I'm 2 1/2 weeks into commuting the 6 miles between home and work. So far I'm enjoying every moment ( though losing my bike lock key on the first day was a little embarrassing!) Anyhow I was expecting the kgs to fly off me but in truth haven't seen much reduction yet. My route is a gentle climb for 2/3 of the route, then flat the rest of the way. coming home is just so, so fast! By the top of the climb my thighs burn like hell and i can hardly breath, but it is getting easier. Of course I could make better use of my gears, but prefer to work hard (no pain, no gain). even on the flat i'm trying to go faster, rather than keeping to a regular cadence. So to the question. Can cycling, by itself, without cutting out too much food help you lose weight, or is cycling more likely to change fat into muscle, help the heart, environment etc. I should add I'm riding a new Hybrid not a road bike, getting fit being a bigger priority than get there quicker. I should add that this forum is proving to be a fantastic inspiration to me. At this rate I might even venture out at weekends!