[TulliusCicero]

Yes, exactly. Which is probably part of why Americans are so overweight, on average. It's a lot easier to get people to exercise if they just do it as part of their normal daily errands; relatively few people have the self-discipline to go to the gym consistently all their lives.

[prodigal_erik]

Weight is lost in the kitchen rather than the gym. It takes nearly an hour on a bike to burn off one big mac, so it's very easy to overeat so much that you can't make up for it.

[TulliusCicero]

Diet is more important, but exercise is still very useful, and not solely for weight loss, it improves general health too.