Wellness

How Much Sleep Do You Really Need?

October 4, 2026 · 4 min read · Sleep & Recovery

Sleep is where your body recovers from training, consolidates what you learned during the day, and resets your energy for tomorrow. Yet for many adults it’s the first thing cut when life gets busy. So how much do you actually need — and what can you do if you’re consistently falling short?

The expert consensus

In 2015, two major expert panels independently reviewed the evidence on sleep duration and health.

7+ hper night recommended for adults (AASM & SRS)

7–9 hrecommended range for adults 18–64 (NSF)

7–8 hrecommended range for adults 65+ (NSF)

Watson et al., SLEEP (2015); Hirshkowitz et al., Sleep Health (2015)

The American Academy of Sleep Medicine and Sleep Research Society (Watson et al.) concluded that adults should sleep 7 or more hours per night on a regular basis to promote optimal health.
The National Sleep Foundation (Hirshkowitz et al.) convened a multidisciplinary panel that recommended specific ranges by age.

Recommended nightly sleep by age (National Sleep Foundation)

Young adults 18–257–9 h

Adults 26–647–9 h

Older adults 65+7–8 h

Hirshkowitz et al. (2015). The panel also listed wider 'may be appropriate' ranges (6–11 h for 18–25, 6–10 h for 26–64, 5–9 h for 65+) to reflect individual differences.

View as table

Item	h
Young adults 18–25	7–9
Adults 26–64	7–9
Older adults 65+	7–8

Most people do best within the recommended range. The wider “may be appropriate” ranges exist because people genuinely differ — but they’re the exception, not a licence to aim for the bottom.

“I’m fine on 6 hours”

Some people really do need less sleep, but they’re rare. More commonly, people adapt to feeling a bit below par and stop noticing it. A useful test is how you feel on holiday after the first few days: if you naturally sleep 8 hours without an alarm, that’s probably closer to your real need.

Quick self-check

You may not be getting enough if you:

rely on an alarm and hit snooze most days;
feel drowsy in meetings, while reading or while driving;
need caffeine to function in the morning;
sleep much longer on weekends than on weekdays;
find your mood, patience or focus slipping in the afternoon.

Two or more of these, most weeks, is a strong hint to protect more time for sleep.

Why it matters for fitness

Training is the stimulus; recovery is where adaptation happens. Short sleep is widely linked to worse mood, poorer focus, higher perceived effort and stronger food cravings — all of which make it harder to stick to your training and nutrition. If you’re doing everything “right” and still stalling, sleep is one of the first things to check.

Time in bed is not time asleep

Most people take 10–20 minutes to fall asleep and wake briefly during the night. To actually sleep 7.5 hours, you usually need about 8 hours in bed. Plan your bedtime around that.

You need to wake at	For 8 h in bed, lights out by
5:30 a.m.	9:30 p.m.
6:30 a.m.	10:30 p.m.
7:00 a.m.	11:00 p.m.
7:30 a.m.	11:30 p.m.

Five steps to more sleep

Set a fixed wake time — seven days a week if you can. A consistent wake time anchors your body clock more than anything else.
Count back 8 hours and set a “lights out” reminder on your phone.
Start winding down 30–60 minutes earlier with dim lights and no work. See our 30-minute wind-down routine.
Keep your bedroom cool, dark and quiet. Blackout curtains, an eye mask or earplugs are cheap fixes.
Cut caffeine by early afternoon. In a sleep study, caffeine taken six hours before bed still reduced sleep by more than an hour — read more in caffeine and sleep.

A two-week reset plan

Days	Focus
1–3	Track your actual bedtime and wake time. No changes yet.
4–7	Fix your wake time. Move bedtime 15 minutes earlier.
8–10	Move bedtime another 15 minutes earlier. Add a 30-minute wind-down.
11–14	Hold steady. Set a caffeine cut-off 6+ hours before bed.

Gradual shifts of 15 minutes are easier to stick to than a sudden one-hour change.

When to see a doctor

Persistent insomnia, loud snoring, gasping or choking during sleep, or severe daytime sleepiness despite enough time in bed can be signs of a sleep disorder. These deserve proper medical assessment — not just better habits.

FAQ

Can I catch up at the weekend? A lie-in can help you feel better after a short week, but big swings between weekday and weekend schedules disrupt your body clock. A consistent wake time is a better long-term strategy.

Are naps good or bad? A short nap (around 20 minutes, early afternoon) can boost alertness for many people. Long or late naps can make it harder to fall asleep at night.

Does exercise help sleep? Many people find regular activity helps them sleep better. If late-evening hard training keeps you wired, try moving it earlier.

Is 8 hours the magic number? No single number fits everyone. The consensus is 7–9 hours for most adults; find where you feel and perform best within that range.

The bottom line

Aim for 7–9 hours a night (7–8 if you’re over 65), which usually means about 8 hours in bed. Protect a consistent wake time, wind down properly, and cut caffeine early.

Sources

Watson NF et al. (2015). Recommended amount of sleep for a healthy adult: a joint consensus statement of the American Academy of Sleep Medicine and Sleep Research Society. SLEEP. doi:10.5665/sleep.4716
Hirshkowitz M et al. (2015). National Sleep Foundation’s sleep time duration recommendations: methodology and results summary. Sleep Health. doi:10.1016/j.sleh.2014.12.010
Drake C et al. (2013). Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of Clinical Sleep Medicine. doi:10.5664/jcsm.3170

This article is general education for healthy adults, not medical advice. Check with a qualified professional before starting a new exercise or nutrition plan, especially if you have a medical condition. Full disclaimer.