The point is not that they can eat more. It's that they can gobble large quantities of straight up sugar without developing metabolic disease. To quantify this

The point is not that they can eat more. It's that they can gobble large quantities of straight up sugar without developing metabolic disease. To quantify this, on a weekly long ride they may consume 300g of refined sugar, far far beyond the often recommended limit of 20g of sugar per day. So perhaps the sedentary person would benefit from walking or leisurely cycling to work a whole more than by trying to restrict their diet