> I don't want to call you out for exaggerating, but you are approaching exaggeration by orders of magnitude. A mars bar is under 300 calories.
I was making a general point. It is easier to stop eating than to lose weight by exercise. Much easier. Also mars bars have been undergoing food inflation. It's another sinister conspiracy we can actually prove is real. They used to be about 1/3 bigger. The world around you seems a little darker now doesn't it.
> For me? a 6', 210lb man? bicycling for one hour at 14-16MPH is gonna burn well north of 900 kcals.
I should warn you that those machine counters are kind of optimistic. The human body is really good at holding onto calories. We walk and run very efficiently, I think we may even be the most efficient at long distance running in the animal kingdom.
I'm not trying to stop you running or cycling around. I approve of it. It is very good for your health even if it doesn't lose many calories. I think there is also a multiplier affect indirectly coming from exercise in that it elevates mood and this makes you less likely to binge on food. It is however probably not the calories you burned per se that are causing you to lose weight, not unless you're the 1% that actually exercise seriously and continually.
Maybe this is subjective. I don't consider 500 calories a lot of food, but to me it's a significant amount of running. A mouthful of food vs half an hour on a treadmill.
> I'd bet money that the increased caloric intake of our ancestors is entirely explained by their increased physical activity.
I'm not denying our ancestors were very much more physically active than we are. Probably that accounts for at least half the results despite us also eating half or less of the calories we used to.
I think there could be confounding factors. Like a slightly warmer world would presumably mean the inhabitants burn less calories on an ongoing basis. Less obvious factors could invisibly add 50 or 100 calories per day and that would add up over time.
By the way I am not fat! This isn't an attempt to avoid guilt :)