Hours of sleep
How many hours to sleep as an adult
How we calculate it
- Your ideal hours: we start from the 7-9 hours that the American Academy of Sleep Medicine and the National Sleep Foundation recommend for adults 12. Experts in sleep and sport recommend tailoring the target to each person 3: that is why, if you train 4 days a week or more, train hard, work 10 hours or more or are under a lot of stress, we move your target towards the upper end.
- Your score: points are taken off for each hour you are missing, for waking up tired, for stress, for afternoon coffee, for screens in bed and for going to bed late.
- Your plan: we give you the changes most likely to help, starting with the ones that matter most in your case.
Sleep, in figures
What the studies measured
Why it matters if you exercise
Sleep is when your body really recovers. In a study with basketball players, sleeping almost 2 hours more for several weeks made them run faster and make 9% more of their free throws 4. And what you consume counts too: 400 mg of caffeine 6 hours before bed cut sleep by more than an hour 5. Training in the evening does not worsen sleep, except for an intense effort that ends less than an hour before bed 6.
Your bedtime routine
The habits that make the biggest difference
Your bedtime routine
Habits make the biggest difference: regular hours, low light in the evening, screens out of bed and caffeine well away from bedtime. If you want to add a supplement, Sleep Recovery contains glycine, tryptophan, L-theanine, magnesium, vitamin B12 and melatonin, in one serving 30-40 minutes before bed. Vitamin B12 contributes to normal functioning of the nervous system.
Frequently asked questions
How many hours should I sleep if I exercise?
The reference for adults is 7 hours or more, and the National Sleep Foundation recommends 7-9 between the ages of 18 and 64. If you train hard, work long hours or are under stress, aim for the upper end.
How do I know if I am getting enough sleep?
The most useful clue is how you feel and perform during the day. If you almost always wake up tired, you probably need to sleep more or sleep better.
Does sleeping more improve performance?
In a study with basketball players who slept almost 2 hours more for several weeks, they ran faster and made 9% more of their free throws.
What time should I have my last coffee?
In one study, 400 mg of caffeine taken 6 hours before bed cut sleep by more than an hour. As a guide, stop caffeine about 6 hours before you go to sleep.
Sources
- Watson NF, Badr MS, Belenky G, et al. Recommended amount of sleep for a healthy adult: a joint consensus statement of the American Academy of Sleep Medicine and Sleep Research Society. Sleep. 2015;38(6):843-844. View publication
- Hirshkowitz M, Whiton K, Albert SM, et al. National Sleep Foundation's sleep time duration recommendations: methodology and results summary. Sleep Health. 2015;1(1):40-43. View publication
- Walsh NP, Halson SL, Sargent C, et al. Sleep and the athlete: narrative review and 2021 expert consensus recommendations. Br J Sports Med. 2021;55(7):356-368. View publication
- Mah CD, Mah KE, Kezirian EJ, Dement WC. The effects of sleep extension on the athletic performance of collegiate basketball players. Sleep. 2011;34(7):943-950. View publication
- Drake C, Roehrs T, Shambroom J, Roth T. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. J Clin Sleep Med. 2013;9(11):1195-1200. View publication
- Stutz J, Eiholzer R, Spengler CM. Effects of evening exercise on sleep in healthy participants: a systematic review and meta-analysis. Sports Med. 2019;49(2):269-287. View publication
A varied and balanced diet and a healthy lifestyle are important.
