A mixed week in sleep science, with four findings worth knowing about - a promising trial for trauma nightmares, a hidden sleep problem among older workers, the quiet power of a steady daily routine, and a fresh clue about sleep and the ageing brain. Here is what caught our eye, in plain English.
A prescription cannabis medicine eased trauma nightmares
Researchers at Charite in Berlin ran a randomised, placebo-controlled trial in more than 170 people with PTSD and frequent nightmares, giving them either dronabinol - a prescription medicine containing THC - or a matching placebo each evening for ten weeks. Nightmare severity fell further in the dronabinol group, and more than a third of those on the medicine said their nightmares had stopped completely by the end. This is a single trial of a prescription-only medicine taken under medical supervision, so it is early, promising evidence rather than anything to try at home.
Why it matters: Trauma nightmares are stubborn and often go undertreated, so a carefully tested option is genuinely hopeful news for the people who live with them.
ScienceDaily / Charite - Universitatsmedizin Berlin
A hidden sleep problem among workers over 50
A year-long University of Edinburgh study followed 45 workers aged 50 to 66 who had no history of sleep disorders, pairing wearable data with regular wellbeing check-ins. Nearly 70 per cent turned out to have persistent, clinically significant sleep problems, and the data pointed to frequent night-time awakenings, rather than simply too few hours, as the main culprit - with work-related stress closely linked. It was a small study, so it is best read as a flag worth raising than the final word.
Why it matters: If you clock a reasonable number of hours but still wake up tired, the continuity of your sleep may matter more than the total on your tracker. A calm, consistent wind-down is a good place to start, and our guide to building a bedtime routine that actually works covers the basics.
A steady daily routine linked to less pain and low mood
A University of Missouri team looked at 67 older adults, 37 of them with insomnia, and found that those who kept regular times for waking, eating, socialising and going to bed reported less physical pain and fewer symptoms of low mood - regardless of how well they actually slept. The researchers think consistent daily time cues help keep the body clock in sync and limit the effects of what they call social jet lag. It was a small, snapshot study, so it shows a link rather than proving that one causes the other.
Why it matters: Keeping your days and nights on a fairly even keel, weekends included, is free and gentle and worth a try. If your body clock feels all over the place, our guide to resetting your circadian rhythm is a kind place to begin.
ScienceDaily / University of Missouri
A gene may shape how much poor sleep affects the ageing brain
Scientists at Edith Cowan University in Australia studied a gene called AQP4, which helps run the brain's overnight waste-clearing system, alongside people's sleep patterns, brain scans and memory tests. They found that shorter sleep was tied to faster loss of grey matter in people carrying certain versions of the gene, but not in others - hinting that the same sleep habits may affect different brains in different ways. The team are clear that these findings are preliminary and need repeating in larger, more varied groups before anyone should think about genetic testing.
Why it matters: It is a useful reminder that the brain does important housekeeping while we sleep, and that protecting your sleep is one of the few levers genuinely within reach. There is more on that quiet, restorative work in why deep sleep is more important than you think.
ScienceDaily / Edith Cowan University
That is your four for this week. As ever, no gadgets or grand plans required - a steady bedtime, a cool dark room and a little wind-down time still do most of the heavy lifting. If you would like the fundamentals in one place, our sleep hygiene habits guide is worth a look.
Kinder nights, clearer days. SleepyDeepy.
