Sit Up Straight: McGill Study Links Upright Posture to Bolder Choices and a Stronger Sense of Pride

Workers who slump over their screens may be doing more than straining their backs — they may also be nudging themselves toward caution and self-doubt. That is the implication of a decision-making experiment run at McGill University in Montreal, where researchers found that posture shapes both how boldly people gamble and how good they feel about the outcome.

Nearly 200 volunteers took part in the study, led by Jorge Armony of the Department of Psychiatry and Psychology. The findings appeared in the British Journal of Psychology.

A balloon game, two seating positions

Participants played a standardised balloon-inflation game on a tablet. One group used the device on an adjustable stand while sitting upright; the control group worked at a low table, leaning forward. Upright sitters made riskier choices, earned higher returns and reported a more pronounced feeling of pride than their hunched counterparts — and afterwards spoke significantly more positively about the decisions they had made.

Armony stressed that workplace ergonomics extends past the purely preventive case for back health. Physical alignment, he argued, can materially influence mental state, self-confidence and business decision-making.

Why the body talks to the brain

Such effects line up with neurobiological work on proprioception. The brain continuously reads signals from the body, and an open, upright stance conveys security and control, underpinning subjective self-assurance. Sitting persistently bent over screens or mobile devices, by contrast, can reinforce tendencies toward insecurity and anxiety.

Back in 2010, a team around Harvard researcher Amy Cuddy put forward the hypothesis that brief upright poses could lower the stress hormone cortisol, though later replication debates made clear that such hormonal responses vary in strength from person to person.

Physiological processes feed into cognitive performance as well. According to professional analyses by physiotherapists, a permanently crooked sitting position often produces shallower, faster breathing. That lowers the carbon dioxide content in the blood and worsens oxygen supply. Restricted diaphragm mobility can, via altered nerve signals, encourage drowsiness, concentration problems and mental fog. Muscular imbalances also develop, with tight chest and neck regions paired with weakened postural muscles.

Nine to ten hours in a chair

The results matter against the backdrop of modern office work. Analyses from the Chair of Planetary and Public Health at the University of Bayreuth, citing DKV surveys, put the average sitting time of employees in Germany on working days at nine to ten hours. Long, uninterrupted sitting favours chronic conditions such as type-2 diabetes, cardiovascular complaints and depression.

Employment is also shifting increasingly into the home. In August 2026, according to figures from the Aktion Gesunder Rücken (Campaign for Healthier Backs), 35.1 percent of people working in the service sector did so at least part of the time from home. Data from the German Social Accident Insurance (DGUV) show that more than 40 percent of screen workers complain of neck or back problems.

Ergonomics specialists therefore recommend dynamic working patterns alongside height-adjustable desks. A common rule of thumb is 60 percent sitting, 30 percent standing and 10 percent moving, combined with a screen positioned at eye level — a formula meant to protect both the body and mental performance.