>When humans eat animals to get their replacement calories for walking to work... Yeah, if I am hungry after a walk I throw a steak in the frying pan. /s Ener

>When humans eat animals to get their replacement calories for walking to work... Yeah, if I am hungry after a walk I throw a steak in the frying pan. /s Energy for extra activity comes out of carbs and fats. Moderate level activity like walking does not increase the need for expensive food with protein in it.