Sleep Science This Week: March 29 - April 4, 2026

This comprehensive review examines how obstructive sleep apnea (OSA) significantly increases stroke risk through inflammatory pathways — particularly the PI3K/Akt signaling pathway, Toll-like receptor signaling, and the NLRP3 inflammasome.

The numbers are striking: 67.5% of ischemic stroke patients have OSA, and moderate to severe OSA dramatically increases stroke risk independent of other factors like hypertension or obesity.

Critically, the review found that early CPAP treatment was associated with reduced stroke recurrence rates — and the earlier the intervention, the better the outcomes. This positions CPAP not just as a comfort measure, but as a potentially life-saving cardiovascular intervention.

If you or someone you know has sleep apnea, this research is a compelling reason to take treatment seriously. CPAP adherence may be protecting your brain, not just your sleep quality — and starting treatment sooner rather than later makes a measurable difference in long-term outcomes.

A year-long study following 418 participants — completing sleep assessments every six weeks — found no evidence that spring fatigue is a genuine seasonal phenomenon. Despite 47% of participants believing they experience it, objective measurements of sleep quality, daytime sleepiness, and insomnia symptoms showed no seasonal variations.

The researchers argue that "spring fatigue" is a cultural labeling effect — we expect to feel tired in spring, we have a name for it, and so we attribute normal tiredness to the season rather than investigating the real cause.

This is known as a cognitive bias: when we have a ready-made explanation, we stop looking for the real one.

If you're feeling persistently tired in spring (or any season), don't dismiss it as seasonal. The data shows fatigue doesn't have a built-in seasonal rhythm — which means your tiredness likely has a real, addressable cause worth investigating with your doctor.

This feasibility trial tested digital cognitive behavioral therapy for insomnia (dCBT-I) in 24 people who had both insomnia and pre-diabetes. The results were encouraging: 83.3% of participants completed four or more sessions, showing strong engagement with the program.

Beyond sleep improvements — including significant reductions in insomnia severity and depression scores — the intervention showed promising trends toward improved metabolic markers, including reductions in triglycerides, lactate, and glycerol levels.

While the study is small and preliminary, it opens the door to an important idea: treating insomnia could be a tool in diabetes prevention, not just a comfort measure.

If you're living with pre-diabetes and also struggling with sleep, don't treat these as separate problems. This research suggests they may be deeply connected — and that addressing your insomnia with an evidence-based program could support your metabolic health at the same time.