Confidence tier Unsupported

The deep-squat warning is usually traced to a 1961 study of 128 weightlifters. Trials since found squatters' knees no looser, and among 2,607 adults those who had strength trained had less knee arthritis; one trial pointed the other way. Hours of kneeling or squatting at work are a different matter. Most of the nine benefits of twenty squats a day rest on studies of something else.

In a randomised trial, twelve weeks of daily glute exercises left cellulite scores where they started. In a small five-month trial, a diet with 40% of its calories from carbohydrate, a modest cut rather than a true low-carb diet, improved neither weight nor cellulite. The treatments that helped, an injection and some devices, helped modestly, mostly in trials their makers paid for.

A seller told buyers that 90% of Americans have parasites. In 129,732 rounds of parasite testing doctors ordered at a national laboratory, 1.7% found one that causes disease. We found no trial of a cleanse in people without an infection; herbs tried on people who had one gave mixed results, and against the drug they mostly lost.

A widely watched caregiving channel says stress keeps caregivers' cortisol high, and another of its videos puts their extra risk of dying at 63%. That figure came from strained spouses in one 1999 study. In the large studies since, caregivers died less often than similar non-caregivers. What rises, consistently, is depression and stress.

A video watched 4.3 million times says people who never get dementia share a morning habit. In a ten-year Dutch trial of a habit programme, 11.6% got dementia against 11.9% without it. The programmes lift test scores a little; the clearest cut in diagnoses came from treating high blood pressure.

The number on the display has a decimal place. In the best direct test, one reading from the worst of three bathroom scales fits a DXA value anywhere across a 23-point span, and even the best scale's band was about 13 points wide.

Slowing the rep down is sold as the secret to growth. A 2025 meta-analysis of 14 studies that changed only the tempo found a difference of 0.09 — and it leaned the other way.

Soreness is the most popular progress gauge in the gym, and it is not measuring progress. It tracks muscle damage only loosely, and in the trials that measured growth it did not predict it.

A vest is credited with 1.6 lb of extra fat loss. That figure rests on one eight-week trial, and in it the women who wore only the vest gained fat. The bone claim got its best test during weight loss, in 150 people over a year, and failed it.

A panel convened because nobody could agree what zone 2 was. They agreed on a definition — and then wrote that the adaptations might not be unique to it. Meanwhile the calculators cannot find it on you.