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How Much Sleep Does A Twelve-Year-Old Need? | School-Night Rules That Work

A 12-year-old needs 9–12 hours of sleep per day; many do best with 9–10 hours during the school year.

To raise vo2 max, run 3–5 days weekly with two easy runs and one or two interval days, building 150–300 weekly minutes across effort levels.

A six-year-old needs 9–12 hours of sleep per day, with most children thriving around 10–11 hours.

A seven-year-old needs 9–12 hours of sleep per 24 hours; most kids land near 10–11 hours on school nights.

Most five-year-olds need 10–13 hours of sleep in 24 hours, including naps, to keep mood, growth, and learning on track.

Most 9-month-olds need 12–16 hours of total sleep per 24 hours, usually about 11–12 at night plus 2–3 hours of daytime naps.

Most three-year-olds need 10–13 hours of sleep in 24 hours, including naps, to stay well-rested.

Most two-year-olds need 11–14 hours of total daily sleep, including a daytime nap.

For the human body, adults need 7–9 hours nightly, teens 8–10, school-age 9–12, and infants much more, with steady, good-quality sleep.

Most bodybuilders progress on 7–9 hours per night; bump to 9–10 during heavy blocks or when fatigue builds.