If we're honest we can't remember if the Vitra Design Museum exhibition "The Essence of Things: Design and the Art of Reduction" has a section devoted to ergonomics.
If not, they may need to extend it to include "The Half" by Finnish/Korean design collective Studio Sailing to Mars.
Initially developed with musicians in mind, "The Half" is... half a chair
Proportionally. Not physically.
Through the reduced form the sitter is more or less forced to adopt a more positive posture - one simply doesn't have the space to slouch.
Which has to be good.
And although as we say initially developed for musicians "The Half" has obviously potential as a dining chair, in meeting/conference situations. Or simply in flats where space is of a premium.
And what's particularly pleasing about "The Half" is that also looks fantastic.