>get new job 7 miles away
>live in flat area with lots of country roads and side trails
>realise I can cycle to work pretty easily
>suddenly cycling 70 miles per week
>also go low carb and religiously buy salads from work canteen
>drop 60lbs in a year

The people who bemoan "society" instead of personal responsibility sort of have a point.
The moment I didn't have a choice about my activity level weight just fell off.