How do people lose weight by walking on treadmills?

I used a treadmill to lose weight, and it kept track of the calories I burned. The range was between 100 and 200 calories, which is roughly the same as eating two apples. Can I just avoid eating to prevent gaining calories while walking to lose weight?

Hello there, in my perspective, the treadmill activity would burn enough calories to put them in a caloric deficit, which is the only way to lose weight, based on fundamental thermodynamic principles.

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