Many people live with chronic sleep deprivation without realising it — your body adapts, but the toll accumulates. Beyond obvious tiredness, watch for: difficulty concentrating or making decisions, emotional reactivity (snapping at people more easily), craving sugary or high-carb foods, relying heavily on caffeine to feel functional, a short fuse or low-grade irritability, brain fog or forgetfulness, and nodding off in calm, passive situations like reading or watching TV. If you feel like you could fall asleep very quickly almost any time you sit still, that's a reliable sign your sleep debt is significant.

The Epworth Sleepiness Scale (ESS) was developed by Australian sleep researcher Dr Murray Johns in 1991 and remains one of the most widely used clinical tools for assessing daytime sleepiness. It asks you to rate how likely you are to doze off in eight common everyday situations — from reading to sitting in traffic — on a scale of 0 (never) to 3 (high chance). Scores of 0–7 are considered normal, 8–10 suggest mild excessive daytime sleepiness, 11–15 indicate moderate sleepiness, and 16–24 point to severe daytime sleepiness that warrants medical attention. This quiz uses an Epworth-inspired format alongside lifestyle habit questions to give you a broader picture of your sleep health.

This is a really important question, and the honest answer is: a doctor or sleep specialist is the only one who can tell you for certain. However, there are some helpful clues. If you consistently get 7–9 hours of sleep in a good environment but still wake up unrefreshed, experience excessive daytime sleepiness, snore loudly, gasp for air during sleep, or have legs that feel restless or uncomfortable at night — those patterns suggest something beyond habit that's worth investigating. Bad habits (irregular schedule, screens before bed, too much caffeine) can often be improved with changes you'll notice within 2–4 weeks. If lifestyle changes don't help, please speak to your GP — sleep disorders like sleep apnoea, insomnia disorder, or restless leg syndrome are very treatable once properly diagnosed.

The evidence consistently backs these: Keep a consistent wake time — even on weekends. This is arguably the single most powerful lever for sleep quality. Make your bedroom dark and cool (around 17–19°C / 63–66°F is ideal for most adults). Avoid screens for at least 30 minutes before bed — blue light suppresses melatonin by up to 50%. Cut caffeine by early afternoon — it has a 5–6 hour half-life, so a 3pm coffee can still affect you at 9pm. Get natural light in the morning — this anchors your circadian clock. Wind down with a consistent routine — your nervous system learns signals. Reading, gentle stretching, or a warm shower 1–2 hours before bed all work well. Avoid alcohol as a sleep aid — it may help you fall asleep but fragments the second half of your night significantly.

Most adults need 7–9 hours per night, according to the National Sleep Foundation and the American Academy of Sleep Medicine. About 1–3% of people genuinely thrive on less due to a rare genetic variant — but most people who claim they "only need 6 hours" are simply adapted to being chronically sleep-deprived (their bodies have stopped sending strong sleepiness signals). The best way to find your personal sweet spot: during a holiday week with no alarm, note what time you naturally fall asleep and wake up after a few days of catching up. The difference is roughly your true sleep need. Teenagers generally need 8–10 hours, older adults often sleep lighter and may wake earlier but still need 7–8 hours total.