0 energy consumption for activities sleeping 83 W sitting in class 120 or walking 280 W playing basketball 300 W - food energy is commonly expressed in food Calories [Cal] 1 Cal = 4.134- kl California Rolls 255 Calories Big Mac 255!I Calories Oreo cookie 55 Calories Dairy Queen Oreo Blizzard 680 Calories How long would you have walk to "burn off\" a Big Mac