Adopt expansive posture to shift subjective confidence

Upright, open posture — not a "power pose" — reliably correlates with higher self-reported confidence, even if the hormone claims did not hold.

Why it works

Embodied cognition research demonstrates bidirectional links between physical state and mental state: the body does not only express emotion, it partially constitutes it. Slumped, contracted posture activates submissive and defeated cognitive states; upright and open posture is associated with approach motivation and resource appraisal. The mechanism is proprioceptive and interoceptive — the brain reads postural signals as evidence about current status and readiness.

How to do it

1. Before a high-stakes moment, spend two minutes standing or sitting with an upright spine, shoulders back and down, head level, feet planted.
2. Allow your arms to be open rather than crossed — uncrossed arms reduce self-reported anxiety.
3. Do not attempt the dramatic spread-eagle poses from the original study — the behavioral effects come from ordinary upright, open posture.
4. Notice how your self-assessment of readiness shifts after two minutes of this.

Evidence

Expansive posture correlates with higher self-reported confidence and approach states across multiple studies; the meta-analytic picture is moderate and mixed. The hormone claims (testosterone up, cortisol down) did not replicate in pre-registered studies. (observational)

The hormonal mechanism failed to replicate in adequately powered pre-registered studies. Psychological outcomes (self-reported confidence) show smaller, more inconsistent effects than the original paper claimed. The useful takeaway is much more modest than the TED talk suggested.

Sources

• Cuddy, Schultz & Fosse (2018), P-curving a more comprehensive body of research on postural feedback reveals clear evidential value for power posing effects on psychological outcomes, Psychological Science
• Ranehill et al. (2015), assessing the robustness of power posing — no effect on hormones, Psychological Science

Common mistake

Using dramatic, exaggerated "power poses" in public settings — other people’s perception of dominant body language is often negative, and the effect on the self does not require exaggerated expansion.