Item — HN Reader

> This idea changed how I thought about fitness. The simple reality is that you control vastly more calories through what you eat than what you burn through exercise

Any source on that?

> a pretty descent workout burns 200-400

my morning exercise burns 100 kcal (7 min workout) and my evening crossfit training burns 700 (that's what gym website claims)

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If you don't eat the calorie it doesn't have to be burned, your exercise to calorie burned is questionable since there is no real way to measure how much you burned doing those workouts and it verys per person based on a number of factors. Even if you did burn 800 calories a day if you consume 3k without knowing it your still not going to make progress on your weight loss goals.