Get up and walk!
Sahlgrenka academy in Göteborg with John-Olof Jansson https://neurophys.gu.se/english/departments/physiology/about-us/staff?languageId=100001&userId=xjanjo reports in Swedish news (Rapport 19.30 9/1) that they have found with mice experiments that we have a weight sensor in our legs.
If you stay in your sofa or sit in the chair, the brain get the signal “oh this guys body weight is low, he must accumulate fat for the cold winter!”.
If you instead walk around and you are overwight according to bmi the signals to the brain and the liver become instead “Ouch, the body must stop producing fat! this guy has enough of that stuff.”