Science-backed tips to improve your sleep quality.
Submariners sleep in stacked racks shared with two other sailors, under a schedule that for decades ignored the body clock entirely. What happened when the US submarine force ran an 18-hour day, why it stopped in 2016, and what the research means for anyone on shifts.
A plain-English guide to sleeping better, in the order the evidence supports: fixed wake time, morning daylight, an earlier caffeine cut-off, a cool dark room and a wind-down that survives real life. With what each change is worth, where the evidence is thin, and when to stop optimising and see a doctor.
Lying on a painful shoulder compresses the joint all night. The pillow height, positions and arm support that reduce rotator cuff, bursitis and frozen shoulder pain.
Side sleeping only works with two support points. How to place a pillow between your knees correctly – and why fixing the knees without the neck only half-works.
Waking up with neck pain every morning? 7 targeted fixes — pillow height, sleep position, daytime posture, morning mobility, and when to see a professional.
Neck pain from a new pillow is normal for 3–7 nights — but not longer. The night-by-night adjustment timeline, and the signs your pillow is actually wrong.
Most people keep their pillow far too long. Here is exactly how often you should replace your pillow and the warning signs it is time to go.