Deep dive
On the homepage we introduced floor sitting as the position that performs best in the research. Here we go deeper: what sets it apart from other positions, how it fits into everyday life, and what the evidence across cultures suggests. Every claim links directly to its source.
With a chair, bar stool, or standing, on the other hand, a change of position almost always means switching furniture or the whole category. Historically, chair sitting also isn't a physically prescribed default: it tends to flatten the spine's natural curve and only became the cultural norm over time — not because it's anatomically necessary.
Source: Aktion Gesunder Rücken (AGR) e.V., Bewegte Schule: "Sitting on Chairs – The Origin Story of a Mass Phenomenon" (PDF)
Children naturally gravitate toward floor-level sitting postures on their own — a low table with cushions fits that natural preference better than a high chair with a footrest.
Source: Akutmag
On smooth floors, a non-slip mat is worth using so cushions or seating surfaces don't slide out from under you.
Practical note — not a study, our own assessment.
On top of that comes the core and back musculature (including the spinal erectors), which keeps the upper body upright where a backrest would otherwise provide support. These are exactly the muscle groups that, in the Hadza study mentioned on the homepage, were measured as noticeably more active in squatting and kneeling positions than in chair sitting.
Structural adaptations from actual muscle growth kick in later and usually only become measurable after 6 to 8 weeks of regular training. This holds for strength training in general and can reasonably be applied to the muscles worked by regular floor sitting — a hint that patience is part of the process.
Source: Moritani T, deVries HA (1979): „Neural factors versus hypertrophy in the time course of muscle strength gain." American Journal of Physical Medicine 58(3).
A gradual approach helps: short floor-sitting intervals within the PostureShift rotation that you build up over time, rather than sitting on the floor for long stretches from the start.
Practical note — not a study, our own assessment based on general training experience.
Sleep quality and the right mattress firmness are their own, highly individual topic, though. Some people prefer a firmer surface — but that doesn't add up to a blanket recommendation to sleep on the floor.
Source: Indojunkie
Anthropologist Gordon W. Hewes documented more than 100 habitual sitting postures worldwide in his widely cited work — concluding that at least a quarter of humanity habitually rests in a deep squat.
This suggests that movement woven into everyday life can help make separate, compensatory exercise at least partly unnecessary — though it shouldn't be understood as a guarantee or a replacement for exercise, but rather as one building block among several.
Source: Spektrum der Wissenschaft, Raichlen et al., PNAS 2020 (primary source)
It wasn't until the 18th through 20th centuries that both were increasingly reinterpreted as a counterbalance to sedentary living. Cultures that never needed that reinterpretation simply had no use for a separate exercise program — because postural variety and movement were already woven into everyday life.
Editorial context — not a single source, our own historical summary.
A methodical look at everyday posture, with a direct connection to posture-related back problems.
View bookThe title echoes the phrase coined by Dr. James Levine (see Background) — the book itself is written by Kelly Starrett.
View bookNote: the methods presented in this book are debated among experts. Its mention here is a neutral reading tip, not an endorsement of the method by PostureShift.
View book