What’s on the Sleep Stages poster
A 4-row table: Stage · Share · What happens.
One cycle passes through these stages and repeats four to six times a night.
- N1 — light — ~5% — Drifting off; easily woken
- N2 — light — ~45% — Heart rate and temperature fall
- N3 — deep — ~25% — Physical repair, immune function
- REM — ~25% — Dreaming, memory consolidation
Deep sleep dominates the first half of the night; REM dominates the second. Cutting sleep short costs mostly REM.
Questions about the Sleep Stages poster
- What’s on the Sleep Stages poster?
- A 4-row table: Stage · Share · What happens. One cycle passes through these stages and repeats four to six times a night. N1 — light — ~5% — Drifting off; easily woken; N2 — light — ~45% — Heart rate and temperature fall; N3 — deep — ~25% — Physical repair, immune function; REM — ~25% — Dreaming, memory consolidation. Deep sleep dominates the first half of the night; REM dominates the second. Cutting sleep short costs mostly REM.
- Who is the Sleep Stages poster for?
- Sleep Stages belongs to the Body & health section rather than to a school year, because health is not something one grade owns. Anyone learning sleep & mind can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Sleep Stages poster?
- A cycle is roughly 90 minutes. Waking between cycles feels far better than waking inside deep sleep. A wall chart earns its place by being glanceable from where the work is happening, so Sleep Stages belongs on the wall where that health work actually happens, within glancing distance, rather than filed away.
- What other posters go with Sleep Stages?
- Attention, Breathing Techniques and Burnout sit alongside Sleep Stages in the Body & health section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.AttentionBreathing TechniquesBurnout
- Is the Sleep Stages poster free to download and print?
- Yes. Sleep Stages downloads as a free PDF with no account, no email and no watermark, like everything else in the Body & health section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Sleep Stages poster print at?
- Sleep Stages is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Sleep Stages loses nothing.Printing guide
Related posters
Charts that sit alongside Sleep Stages on the same wall.
Browse every Body & health poster, or start from the full catalogue.