Sleep debt in France: figures and hotspots for 2026

The INSV barometers, published every year to mark the Journée du sommeil, point to clear geographical gaps. Île-de-France shows one of the lowest sleep durations in the country, driven by commuting times and urban density. Large cities sleep less overall than rural areas, while industrial and port zones combine irregular hours and shift work.

Beyond geography, some profiles remain structurally more exposed: shift workers (3x8 rotas, nights), hyper-connected young adults, parents of young children, family carers, students during exam periods and overloaded managers.

Inserm identifies several converging factors. Prolonged screen exposure delays melatonin secretion, while remote working and late-night emails blur the boundary between professional and personal life. Chronic stress keeps the nervous system on alert and delays the switch to recovery mode, a mechanism we set out in detail in our article on the sleep-wake rhythm.

To this are added caffeine consumption that is sometimes too late in the day, persistent ambient noise in dense urban areas, and social inequalities that translate into noisy or overcrowded housing.

Santé publique France and Inserm converge on the risks of persistently insufficient sleep: increased cardiovascular risk (hypertension, heart attack), heightened metabolic risk (excess weight, type 2 diabetes), impaired immune response, cognitive difficulties (memory, concentration) and mood disturbances. Drowsiness at the wheel remains, according to the Sécurité routière, one of the major causes of fatal accidents on motorways.

The HAS, in its recommendations on the management of chronic insomnia in adults, places cognitive behavioural therapy for insomnia (CBT-I) as the first-line approach, well ahead of hypnotics. The pillars of good sleep hygiene remain regular bedtimes and waking times, exposure to daylight in the morning, no bright screens in the hour before bed, a cool bedroom (18-19 °C) and regular physical activity.

Some adults include a few drops of sublingual CBD oil, taken 30 to 60 minutes before bed, in a calming evening ritual. MILDECA makes the point: no French authority has validated any therapeutic claim for wellbeing CBD, which does not "make you sleep" and does not "treat" any disorder. See also our article on CBD, melatonin and sleep.

In February 2026, EFSA set a provisionally safe daily dose of 0.0275 mg/kg/day, that is roughly 2 mg per day for a 70 kg adult, far below the dosages commonly offered by brands. Use remains inadvisable for pregnant or breastfeeding women, minors and people on medication, and you should not drive after taking it.

CBD is not a medicine. If sleep problems persist beyond three weeks, consult a doctor.

How many hours of sleep are really needed?

The INSV recommends 7 to 9 hours for most healthy adults. Needs vary with age, sex and each person's metabolic profile.

Can sleep debt be made up at the weekend?

Partly. An extra hour or two helps compensate, but does not fully restore accumulated cognitive deficits. Regularity matters more than occasional catching up.

Does night work affect sleep in the long term?

Working irregular hours has documented cumulative effects on health. Slow rotation, scheduled breaks and adapted meals soften the impact without removing it entirely.

Is CBD an answer to collective sleep debt?

No. No French authority has validated any claim to that effect. Structural levers — the organisation of work, urban planning, education in sleep hygiene — remain the main factors for progress.