Small habits, big studies. What works, with sources.
How many steps a day do you really need? The 10,000 number came from a 1960s gadget ad; the biggest review found most of the benefit by about 7,000. A wall sit three times a week lowered blood pressure in a trial of 100 adults. Students who exercised a little every day slept deeper. Among almost 88,000 people, less than 42 minutes of bright daylight a day was linked to higher dementia risk. Melatonin and CBN gummies have new warnings. Every story below links to its sources.
Almost 88,000 people wore a light sensor on their wrist. Eight years later, the ones who got the least bright daylight were more likely to develop dementia. Here's what that does and doesn't mean.
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CBN is sold as a gentle, non-habit-forming way to fall asleep. A new University of Connecticut study in mice found the body gets used to it quickly, and misses it when it's gone.
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A new trial tested the humble wall sit on 100 adults. Three times a week worked best. But even once a week kept most of the benefit, as long as people didn't stop.
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The claim: it doesn't matter when you exercise, only how much. A study of students wearing Fitbits suggests that, for deep sleep, how often might matter more.
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New World Health Organization figures put dementia in 5th place among causes of death, up from 19th in 2000. Sounds scary. But it's partly because we're living longer. Here's how both are true.
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Millions take it like a sweet before bed. Doctors looked at the records of 130,828 people with insomnia and found something that made them sit up. Don't panic, but do read the small print.
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Your watch buzzes at 10,000 like it's a medical rule. It isn't. The biggest review of the evidence found most of the benefit comes earlier.
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