Body Image & Eating
What If Your Doctor's Scale Has Been Lying to You Your Whole Life?
The most cited measure of healthy weight was invented by a Belgian mathematician in the 1830s — to describe the 'average man,' not to diagnose individual health.
The Idea
Health at Every Size, often called HAES, is not a fringe feel-good movement telling people anything goes. It's a clinical and research framework that challenges a specific assumption most of us have absorbed without question: that body weight is a reliable proxy for health, and that losing weight is therefore a reliable path to it. The evidence that undermines this assumption is more robust than most people realise. What researchers call the 'obesity paradox' keeps appearing across cardiovascular studies, cancer survivorship data, and metabolic research — heavier people in certain categories consistently outliving lighter ones. Meanwhile, longitudinal studies on intentional weight loss repeatedly find that most people regain the weight within five years, and that the cycle of loss and regain may itself carry metabolic costs. HAES doesn't argue that weight is irrelevant to health. It argues that the relationship is far messier than clinical culture has assumed — and that when we treat weight loss as the intervention, we often neglect the actual drivers of health: movement that someone enjoys enough to sustain, consistent and varied nutrition, sleep, stress regulation, access to care, and the psychological toll of chronic shame. The genuinely surprising part is this: when studies compare weight-focused interventions with HAES-based ones, the HAES groups tend to show more durable improvements in blood pressure, cholesterol, and psychological wellbeing — even without significant weight change. The scale, it turns out, may be measuring the wrong thing entirely.
In the World
Linda Bacon — a researcher who spent years inside conventional nutrition science before becoming one of HAES's most prominent voices — ran one of the more carefully designed studies in this space in the early 2000s. She and her colleagues recruited women who had been through repeated dieting cycles and split them into two groups: one following a conventional calorie-focused diet program, the other following a HAES approach that emphasised hunger awareness, joyful movement, and dismantling the belief that their bodies were problems to be solved. At the two-year follow-up, the diet group had largely regained any weight lost and showed no significant improvements in metabolic markers. The HAES group had not lost meaningful weight — but they had sustained improvements in blood pressure, cholesterol, and self-esteem. Crucially, they were still showing up. The diet group had largely dropped out. This pattern — the HAES group staying engaged, the weight-loss group abandoning ship — reflects something psychologically significant. When the metric you're measured against is one your body consistently resists, you eventually stop trying. When the goal is genuinely within reach (moving in ways that feel good, eating with more awareness), people keep going. Bacon's book, 'Health at Every Size,' published in 2010, brought this research to a broader audience and sparked both serious academic engagement and significant pushback — much of it, notably, from industries with a financial stake in weight-loss culture continuing unchallenged.
Why It Matters
Most of us carry, somewhere in the background, a quiet belief that our worth as a healthy, disciplined person is tied to our weight. That belief shapes how we eat (with guilt rather than attention), how we move (as punishment rather than pleasure), and how we talk to ourselves when we look in a mirror. Encountering HAES doesn't require you to adopt a political position or abandon everything you think you know about nutrition. It requires something more modest and more interesting: a willingness to question whether the framework you've been using to evaluate your own body is actually the right one, or whether it was handed to you by a culture that had commercial and aesthetic reasons to keep you dissatisfied. If health is actually downstream of behaviours — and the evidence strongly suggests it is — then the question worth asking yourself isn't 'what weight should I be?' but 'what does taking care of myself actually feel like from the inside?' That shift in framing changes what you notice, what you pursue, and perhaps most importantly, how much compassion you extend to yourself on the days when nothing is going particularly well.
A Question to Ponder
If weight were completely invisible — if no one, including you, could see or measure it — what would 'taking care of your body' actually look like for you?
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