Yes, and I play a little head game with myself, sometimes.
Remember knights in shining armour? Well, a suit of full plate armour weighed approx 35-55 pounds. Let's say that is 42 pounds or 3 stone.
See where I am going?
If you are 3 stone overweight, then every step, all day, you are carrying round the equivalent of an entire suit of mediaeval plate armour. And it is directly comparable, because plate armour is distributed around the body, just like excess fat.
And if you are 6 or 9 stone overweight, that is two or three sets of armour. Every step, up stairs, down, out to the bins, down to the shop...
Always makes me laugh when slim people bounce to their feet and skip up stairs and suggest walking up hills. I'll bet they wouldn't do it as easily in full armour!