Spontaneous physical activity (NEAT) and voluntary exercise tend to decrease as weight is lost.

“then there's also the neat component as you lose weight you become spontaneously less active we see this in animals all the way up to humans then not just that voluntary exercise tends to go down past a certain point like if you're very obese and you start to lose weight it's not really going to affect this that much because you have such an energy Surplus um but especially people who are going average to lean your Vol like your will to exercise will go down”