Same here, I quickly picked 10kg after having kids and giving up intensive martial arts trainings. But, those would be way more if I didn't pay close attention

Same here, I quickly picked 10kg after having kids and giving up intensive martial arts trainings. But, those would be way more if I didn't pay close attention at the calories intake (as exercise is very moderate nowadays, so to say) - I noticed what happens when I let it slip for like a week, bang 1 kg (2 pounds). So it's both.