Postural feedback

Postural feedback is the idea that the position the body is held in feeds back on emotional state and behaviour, rather than posture simply reflecting how a person already feels.

The most famous version of this claim, that adopting expansive power poses for two minutes changes hormones and risk taking, is also its cautionary tale. The original 2010 finding was hugely popular and the hormonal and behavioural effects have repeatedly failed to replicate in larger, pre-registered studies.

What has survived replication is narrower and still interesting: people commonly report feeling somewhat more confident or powerful after adopting expansive postures. A self reported feeling is a real effect and a much smaller claim than the one that was originally sold.

That trajectory makes it a useful case study in reading evidence, which is partly why it earns an entry here. A striking result, a popular talk, a wave of adoption, and then a decade of replication work cutting it down to a self report effect.

There is a separate and better supported literature on posture and physical function, which should not be confused with the emotional claim. Posture correlates poorly with back pain, and posture correction products have little to support them, while strength, activity and confidence in moving have considerably more.

For training, the practical residue is minimal. Standing tall before a heavy set may help you feel ready, and that is a psychological warm up rather than a hormonal intervention.

In practice, treat expansive posture as a possible small confidence cue with no measurable physiology behind it, and treat any claim that a pose changes your hormones as superseded.