A meta-analysis of 1,158 people found no regional fat loss from targeted exercise. A review of 231 participants ranked which lifts actually work the glutes. Together they turn the toning plan on its head.

Low-carb, low-fat, high-protein, Mediterranean: which loses more? Five landmark trials, the two-year DIRECT study, a 609-person head-to-head and a 121-trial network meta-analysis agree on the number - and on where the ratio still matters.

CLA is sold as a fat-burner. The pooled human trials put the effect at 90 grams of fat per week at 3.2 g/day - and a 56-trial analysis found it raises LDL and triglycerides while doing it. The mouse data started a story the human data does not finish.

Resting metabolism, the cost of digesting food and physical activity make up your daily burn. The catch is that the body compensates for roughly a quarter of what you spend in exercise - more if you carry more fat. Here is the arithmetic, from the doubly-labelled-water studies.

Eating six small meals does not help, fibre quietly cuts intake by about a tenth, vinegar increases fullness in a dose-dependent way, and fish may beat beef at the next meal. Here is what the controlled studies say about the dietary levers on hunger.

Heavy and binge drinking, short sleep, sugary drinks and low vegetable intake track with weight gain; smoking lowers BMI but shifts fat to the abdomen and quitting brings it back. Here is what the cohort and cross-sectional evidence supports, and what to change first.

Intensive lifestyle programmes hold about 5% weight loss at eight years, the newest medications produce more than 10% versus placebo across 60,000 trial participants, and surgery removes 50-60% of excess weight. Here is the evidence tier by tier, and what drives the spread between people.

LDL cholesterol is the number everyone knows; apolipoprotein B - the count of atherogenic particles - is the one that carries the causal signal. Raising HDL with drugs saved nobody. Here is how the pieces of a lipid panel fit together, and what training does to them.

Lose 0.5-1% of body weight a week, eat 2.2-3.1 g/kg of protein, keep fat above a floor, use diet breaks, and treat peak-week carbohydrate manipulation as a small, untested finishing touch. Here is what the evidence-based contest-preparation literature says.

The classic Jackson-Pollock equations predict body density with R above 0.90 - in the populations they were built on. Applied to the wrong group they can miss body fat by around 10 percentage points. Here is why a calculator must be sex- and population-specific, and how to use one honestly.

Head-to-head, low-carb edges low-fat by about two kilograms and wins on triglycerides and HDL while low-fat wins on LDL. Over a year, every structured diet loses roughly five kilograms and the gap between them is under one. Adherence, not macronutrients, is the variable that matters.

SSRIs rarely change aerobic performance in temperate conditions, though one dose cut endurance 15% in fit men; bupropion can improve performance in the heat while raising core temperature; and long-term antidepressant use is associated with about 2% extra body weight over six years. Here is the evidence for athletes and coaches.

The obese mouse's bacteria make a lean mouse fat - proven. Whether a capsule of bacteria makes a person lean is not. What the microbiome really explains about obesity, and why probiotics are not a weight-loss pill.

Obesity is half inherited and only six percent explained - genes decide who is prone, not who is fat. How the leptin pathway, a thousand small variants and the womb shape body weight.

Weight regain isn't a failure of willpower - it's biology defending the old weight. Lose 10 percent and you burn about 375 fewer calories a day than your new size predicts, hunger hormones stay elevated for one to two years, and 50-80 percent of lost weight returns within 3-5 years. What actually helps.

Across 53 trials in 2,873 adults, combining aerobic and resistance training cut body fat as effectively as cardio alone and built muscle as effectively as lifting alone. The old fear that cardio kills your gains is largely misplaced. How to combine them for fat loss with lean mass preserved.

A 2025 study of 71 middle-aged adults with obesity found the hybrid group lost roughly twice as much body fat as endurance training alone, and a randomised trial in obese college students found combined training cut body fat further than resistance work alone. Adding weights to cardio does not slow fat loss - it accelerates it.

A meta-analysis of 13 trials and 1,158 people found 17 comparisons favouring the trained limb and 20 favouring the untrained - a pooled effect of -0.03. And high-repetition 'toning' work builds muscle about as well as heavy work, but does not preferentially strip fat from anywhere. The four biggest fat loss myths, checked.

Across 11 trials and 568 people who had already lost weight, exercise groups regained 2.81 kg less than controls - with zero heterogeneity across studies. And the maintenance threshold is 250 to 300 minutes a week, far above what most people are told during the losing phase. Why exercise is the wrong tool for one job and the right one for the other.

A registry of more than 4,000 long-term maintainers and a meta-analysis of maintenance trials agree on the behaviours that separate people who keep weight off from people who regain it.