Haha Loget, depends how fast you run :P If you get a punch in its even better.
When I was 16 I started putting on a fair bit of weight because I din't do any excerise, then my missus told me I was getting rather fat, so did my parents.
Decided to buy a gym set put it outside and I use it daily, now have a four pack, nearly six and a shitload bigger then what I use to be.
I haven't touched soft drink in two years either, it's just water for me or the odd bottle of rum.