Because not every metabolism is built equally? I ate like shit and barely exercised for 10 years working as a programmer and my weight stuck at 180lb/82kg the entire time. Nowadays I get a lot more exercise and still eat like shit and weigh 170. My buddy watches his food intake properly and takes a walk every day, and he’ll gain 10 pounds just by looking at a tray of cookies, bounces over and under the 200lb mark constantly.
Because not every metabolism is built equally? I ate like shit and barely exercised for 10 years working as a programmer and my weight stuck at 180lb/82kg the entire time. Nowadays I get a lot more exercise and still eat like shit and weigh 170. My buddy watches his food intake properly and takes a walk every day, and he’ll gain 10 pounds just by looking at a tray of cookies, bounces over and under the 200lb mark constantly.