Body weight comes down to a simple ledger: energy in (food) vs energy out (everything you burn). Tip the balance and see what happens.
Balanced
Energy balancein vs out
Energy out has three parts: BMR (~60–70%, the energy to just stay alive), physical activity (~20–30%), and the thermic effect of food (~10%, digesting it).
📷 Reference image
A real labeled figure to compare with the interactive above.
Energy Balance — OpenStax, CC BY 4.0 (via Wikimedia Commons)
