I've always been a little bit on the big side, but now I'm about 45 lbs over where I should be. When the weather is good, I go for a walk at the city park or the nature center. Yet, it feels like "work" and it's hard to maintain a decent pace.
Yet, I exert just as much, if not more, energy on my bridge excusions and I never considered them work, per se. I'm working (walk across old bridges, climbing down embankments, etc), but it doesn't feel like work. It feels like fun (unless I break my ankle like I did 5 years ago).
So I guess the secret to losing weight is to chase more bridges and climb down more embankments?