Does walking outside during the day help me sleep better at night?
A daily walk of around half an hour outside helps improve your sleep, as shown by a randomised study. The surroundings matter little, but air pollution can dampen the effect.
Walking outside for 35 minutes a day measurably improves sleep quality. A randomised study of 104 students with sleep problems showed this: after seven days their sleep had improved significantly, whether they walked through a park or through the city. Nature itself made no difference; what mattered was moving around outdoors.
A smaller pilot study of fourteen inactive adults who went outside to exercise at least three times a week for eight weeks also found an increase in the proportion of good sleepers, from 50% to 64%. This difference was not statistically significant, however, most likely because the study was simply too small to demonstrate anything with certainty.
People who regularly use walking trails also report better sleep than people who do not. But this type of comparison shows only an association, not a cause. It is equally possible that people who already sleep well simply go outside more often.
There is one caveat when it comes to walking outside in busy or polluted areas. Research covering 58 studies shows that higher air pollution is associated with poorer sleep quality and shorter sleep duration. If you live or walk in an environment with heavy traffic or industry, this benefit may be partly cancelled out.
For cancer patients the picture is currently too unclear to say anything about the effect of outdoor exercise on sleep; that research has provided too little solid ground.
Based on one RCT (n=104), one non-significant pilot study (n=14), one cross-sectional study (n=1527), one scoping review (58 studies on air pollution) and one systematic review in cancer patients. PMIDs: 35973933, 37997087, 34700061, 32867226, 40336008.
What can I do to sleep better?
CBT-I is the most powerful approach for persistent sleep problems; if you do not have access to it, ask your general practitioner about a shorter behavioural treatment of four sessions. Fixed sleep times, less caffeine and alcohol in the evening, and regular exercise are the best-supported self-help steps.
Does a consistent morning routine with daylight help you fall asleep more easily in the evening?
A consistent morning routine with daylight helps sharpen your biological clock, allowing you to fall asleep earlier and more easily in the evening. The evidence is not perfect, but consistent enough to make it worthwhile: step outside briefly shortly after waking up.
Does getting more sleep improve my memory?
Sufficient sleep demonstrably benefits your memory: your brain processes and stores new information while you sleep. Too little sleep impairs that processing after just one night.
Does the menopause disrupt my sleep, and what can help?
The menopause genuinely disrupts your sleep, primarily through hot flashes and hormonal changes. Cognitive behavioural therapy for insomnia (CBT-I) is the best first step; hormone therapy or melatonin may come into the picture after that.
What are the best ways to fall asleep more easily?
Cognitive behavioural therapy for insomnia works best and lasts longest; sleeping pills are a short-term solution and are even dangerous in older adults. A digital version of the therapy is a good, accessible first step.
Does a cool, dark bedroom really help you sleep better?
A bedroom temperature of 20 to 25 degrees combined with good ventilation demonstrably improves your sleep. This effect is greatest for older adults, and above 25 degrees sleep quality deteriorates quickly.