Some people&#x27;s bodies just burn more calories in resting than others. Or their resting isn&#x27;t as resting as they think - look at people who sit but their leg twitches up and down.<p>Ultimately it&#x27;s still calories in vs out. But the out isn&#x27;t just burning 500 calories running. It&#x27;s what you burn doing your day to day too.