Hips-Above-Knees Sitting Rule
Raise your hips above your knees to let your spine settle efficiently
- Difficulty
- Starter
- Time to result
- ~days to results
- Steps
- 4
- Confidence
- 94%
The Hips-Above-Knees Sitting Rule uses seat height as a simple input for improving sitting mechanics. When the hips sit below the knees, the pelvis is more likely to roll backward, encouraging the rounded posture Aaron Alexander describes as a ‘sad puppy dog’ position and adding stress to spinal discs. Raising the hips with a cushion or seat adjustment makes a slight forward pelvic tilt easier. That position better matches the wedge-like architecture he describes around the lower spine, especially L5-S1, so the body can rely more on its structure and less on muscular effort. The rule applies whether someone sits on the floor or in a chair: compare hip and knee height, add enough support to put the hips slightly higher, then settle rather than forcing an upright pose.
Origin
Aaron Alexander presents this rule while demonstrating his own cushioned floor-sitting setup and explaining how seat height changes pelvic and lower-spine mechanics.
Core principles
- 01The chair itself is neutral; how the body uses it matters
- 02Hip height influences pelvic position and spinal loading
- 03Support should make efficient posture easier rather than force rigidity
How to run it
- 1
Assess your current height
Sit normally and compare the vertical height of your hips with your knees. Notice whether your pelvis rolls backward when your hips sit lower.
Pro tip Check the relationship from the side or use a mirror instead of judging by feel alone.
- 2
Add enough support
Raise the sitting surface or place a firm cushion under your hips. Use enough height to bring the hips slightly above the knees.
Pro tip For floor sitting, Alexander suggests many people may need a cushion around 10 inches to one foot high.
Watch out A cushion that compresses heavily may not provide the height it appears to offer.
- 3
Allow a slight forward tilt
Let the pelvis tip forward slightly instead of tucking it backward. Do not force a large arch or hold yourself rigidly.
Watch out The goal is an easy ready position, not an exaggerated posture.
- 4
Relax into the setup
Settle into the support and check whether your spine feels easier to stack. Continue making small natural adjustments rather than freezing in one position.
Pro tip Apply the same height rule whether you are using a chair or sitting on the floor.
In the wild
A floor sitter finds that a thin cushion leaves their knees above their hips and their lower back rounded. They replace it with a firmer, taller support until their hips sit slightly above their knees, then allow a small forward pelvic tilt without bracing. This illustrative adjustment applies Alexander's seat-height rule directly.
→ The sitter can relax into a less collapsed position with less effort.
Common mistakes
Using too little height
A small cushion may still leave the hips below the knees, preserving the backward pelvic roll the adjustment is meant to address.
Forcing perfect posture
Rigidly holding the torso upright misses the point. The setup should let the body relax into its architecture and continue moving naturally.
Is it for you?
Best for
It is best for people who sit on floors or low chairs and want a simple setup rule.
Not ideal for
It is not ideal as a substitute for clinical assessment when sitting causes persistent pain or neurological symptoms.
From the transcript
“the big thing if you want to have biomechanical efficiency within your sacrum you know just your spine your hips you want to make sure…”
“you can Rel really relax into the architecture of your spine when you set your hips up above the height of your your knees”
From the episode
Episode 358: Sitting Like Our Ancestors: The Key to Musculoskeletal Well-Being
Sitting Like Our Ancestors