Running on a treadmill for an hour is about 600 calories. Eating an extra snack before bed can easily be that. To be calorie deficient and lose weight, it is so much easier to eat less than to exercise more. On top of that, exercising more can stimulate your appetite... leading to over eating. Basically you just have to be vigilant with not eating too much. I don't think counting calories is important, but 3 small me…
Exactly. The real problem with fat gain/loss isn't sedentary vs. active lifestyles, it's calorie consumption. This is why smokers who never work out are usually extremely thin- they typically eat very little. That isn't of course to suggest that that is healthier than being a non-smoker who is overweight, but rather to show in an extreme case that for fat loss exercise is extremely overrated while simple calorie rest…
The latter might be more effective than the former. Dr. Atkins adopters have challenged people to gain weight on the high fat / high protein diet, and those who took up the challenge simply could not "fatten up" - after a while they could consume only so much meat, cheese, fish and green veggies before feeling completely satiated. So there is a hard practical limit on number of calories consumed on a protein/fat diet.
Compare that to carbohydrate-related cravings, where people talk about having just another [calorie-laden] scone, cookie, or piece of candy, and seemingly losing track of consumption.