Your body is constantly burning calories, even when you're just sitting around, because it needs energy to function, right? It's like your body is a machine that's always on, and it needs fuel to keep running. But when you're active, like when you're exercising or playing sports, your body burns even more calories.
It's kind of like a car accelerator, when you press down on the gas, the car goes faster and uses more fuel, right? And when you're active, your body is like that car, it's using more calories to keep you moving. But instead of using gasoline, your body uses the calories from the food you eat.
So, how does your body decide how many calories to burn? Well, it's based on your basal metabolic rate (BMR), which is like your body's idling speed, and it's different for everyone. Your BMR is affected by things like your age, sex, and weight, and it can even change over time.
