Daily How Much

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.

Sleep helps height gains in kids and teens by aligning growth hormone with deep sleep; aim for age-based totals, while adults won’t grow taller from extra

Most adults need 7–9 hours of sleep after a workout, with heavy training days suiting 8–10 hours and, if needed, a 20–30-minute nap.

Adults need 7+ hours of sleep for good health, while kids and teens need more; regular timing and sleep quality matter too.

Most pregnant adults do best with 7–9 hours of nightly sleep, plus short daytime naps when needed for fatigue and recovery.

Most healthy adults need 7–9 hours of nightly sleep; the right target hinges on health, schedule, and how rested you feel during the day.

Most healthy adults need 7–9 hours of sleep for good health; teens 8–10; school-age kids 9–12; babies and toddlers need more.

Most school-age students need 9–12 hours, teens need 8–10, and college-age students do best with 7–9 hours of nightly sleep.

Aim for 2–4 sets of 10–20 sit-ups per session, 2–3 days a week, with rest days; visible abs depend on training, diet, and body-fat levels.