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The 21-day habit rule came from a plastic surgeon’s book preface
Maxwell Maltz was describing how long patients took to get used to a new face. When researchers finally measured habit formation, the range ran from 18 days to 254.
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Breakfast is not the most important meal of the day
The randomised trials point gently the other way. But the real story is the audit that found only 17% of citations to a key trial described its results accurately.
Health
Stretching Barely Prevents Injuries. Strength Training Cuts Them by Two Thirds.
A meta-analysis of 26,000 participants ranked the injury-prevention strategies head to head. The one everybody does came last. The one almost nobody does came first, by a mile.
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The people who found the Blue Zones are quietly walking them back
Nicoya’s advantage inverted in forty years. Okinawa fell from 4th to 26th. And the researchers conceding this are the ones who identified the zones in the first place.
The latte factor gets the arithmetic right and the mechanism wrong
His sum checks out to the dollar. But 85% of people are passive savers who ignore price incentives, and financial education explains 0.1% of the variance in behaviour.
The 21-day habit rule came from a plastic surgeon’s book preface
Maxwell Maltz was describing how long patients took to get used to a new face. When researchers finally measured habit formation, the range ran from 18 days to 254.
The sleep chart everyone copies has a footnote nobody reads
The age-by-age sleep chart is a compromise document, and the panels that wrote it said so. What the primary sources actually show about how much sleep you need.
Sport news
Breakfast is not the most important meal of the day
The randomised trials point gently the other way. But the real story is the audit that found only 17% of citations to a key trial described its results accurately.
Stretching Barely Prevents Injuries. Strength Training Cuts Them by Two Thirds.
A meta-analysis of 26,000 participants ranked the injury-prevention strategies head to head. The one everybody does came last. The one almost nobody does came first, by a mile.
No health authority has ever recommended 10,000 steps
Every official physical activity guideline is written in minutes, not steps. A 1965 pedometer brand name filled the gap — and it is aimed at exactly the wrong people.
The eight-glasses rule is a sentence someone deleted
The 1945 document blamed for the rule said most of your water comes from food and that thirst is an adequate guide. Both sentences were cut. Here is what the evidence actually shows.
The people who found the Blue Zones are quietly walking them back
Nicoya’s advantage inverted in forty years. Okinawa fell from 4th to 26th. And the researchers conceding this are the ones who identified the zones in the first place.
Recipes
No health authority has ever recommended 10,000 steps
Every official physical activity guideline is written in minutes, not steps. A 1965 pedometer brand name filled the gap — and it is aimed at exactly the wrong people.
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Blue-Light Glasses: What the Cochrane Review Found
Seventeen randomised trials, and no reliable evidence that blue-filtering lenses reduce eye strain. The physics is the more interesting part: the lenses block roughly eight percent more blue light than the clear ones.
Stretching Barely Prevents Injuries. Strength Training Cuts Them by Two Thirds.
A meta-analysis of 26,000 participants ranked the injury-prevention strategies head to head. The one everybody does came last. The one almost nobody does came first, by a mile.
Sugar Does Not Make Children Hyperactive. The Study That Proved It Tested the Parents.
A 1995 meta-analysis of 23 controlled trials found no effect. A year earlier, a smaller study had already explained why everyone believes otherwise — by giving every child a placebo and lying to their mothers.