See my responses to other replies. Metabolic activity != physical activity.
Theres a moralistic inclination on HN to view complex descriptions of weight gain as defences of sedentary lifestyles and bad diets. Inarguably both are bad, obesity is bad etc. That's a separate issue from understanding why weight has increased globally - independently of dietary changes - including in both wild and lab animal populations - https://www.vox.com/2015/8/24/9194579/obesity-animals
Theres a moralistic inclination on HN to view complex descriptions of weight gain as defences of sedentary lifestyles and bad diets. Inarguably both are bad, obesity is bad etc. That's a separate issue from understanding why weight has increased globally - independently of dietary changes - including in both wild and lab animal populations - https://www.vox.com/2015/8/24/9194579/obesity-animals