[almeeker]

I hate to throw this at you, but the less you weigh the less that walk will burn. I started out close to your weight and worked out maybe 30-40 minutes/day. Now I have to workout 2-3 times that just to get the same burn. But seriously it's all worth it. Oh, and if you're looking for a really good burning exercise you might try the elliptical, burns like 7-12 calories/minute.