What Is Your Body’s ‘Set Point’?

Research describes a weight range the body works to maintain, much the way a thermostat holds a temperature.

Part of: Why Weight Loss Is Hard

If you’ve ever lost weight and watched it creep back — no matter how hard you worked — this one fact may change how you see every past attempt: your body has a weight it ‘thinks’ it should be, and it works hard to defend it. Picture a thermostat set to 70 degrees — when the room cools, the heat kicks on automatically. Your body does the same with weight. When you lose some, it raises hunger, lowers the feeling of fullness, and slows how fast you burn energy — pulling you back toward its ‘set point.’



This is why ‘just try harder’ fails so often. It isn’t weak willpower — it’s a biological defense doing exactly what it evolved to do. Understanding it is the first step, because it moves the goal from out-muscling your body to working with it.

The science behind this

Long-term persistence of hormonal adaptations to weight loss (NEJM)

Adaptive thermogenesis in humans, Rosenbaum & Leibel (review)

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