Ella on Instagram: "“Thermodynamically that’s how everyone interprets it” yeah… if you never picked up a physiology book, then yeah. But you have to account for internal use of calories. Digesting food, recovering from exercise, literally existing— all of that contributes to calories out. That’s why thermodynamically, we interpret it as your total daily energy expenditure. #gym #gymmotivation #fitness #scientificsnitch #science #explorepage #explore #gymgirl #gymrat"