Not initially. I commuted for 4 years (22 miles round trip) without losing any weight and I probably gained some. Then I got serious about watching my diet and started tracking all of my calories from food and exercise. That was last December when I got an iPhone for Christmas. One of the first apps I got was a free calorie tracker called LoseIt!, and I started religiously tracking everything I ate and all of my exercise. I set a budget aimed at losing 1 lb/week and remarkably it worked. I lost 30 lbs. by August and have been maintaining that weight since then. I now weigh what I did in college nearly 40 years ago.

The key to losing weight is watching what you eat. Exercise just makes it easier because you can eat more, but you still have to control portions and eat the right kinds of food.