Longer Exhales Linked to Bolder Decisions

Slow breathing with a prolonged exhale can make individuals more willing to take risks. This effect is achieved by altering heart activity and increasing the brain’s sensitivity to rewards. The German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE) and Charité -- Universitätsmedizin Berlin published these findings in the journal *Neuron*.

Decision-making has traditionally been viewed as a brain-centric process. This research suggests that signals from other body parts can influence brain activity and choices. Fast breathing and an elevated heart rate are often associated with rapid decision-making and a cautious approach to avoid losses. Slower breathing and a calmer cardiovascular state may encourage a more positive assessment of potential outcomes.

The study involved 41 healthy participants. They made risky choices under controlled breathing conditions. Participants either breathed at their normal pace or slowed their breathing, extending the exhalation phase. This extended exhalation used a two-to-eight inhale-exhale ratio.

Researchers measured physical and neurological responses. Functional magnetic resonance imaging tracked brain activity. Breathing patterns, heart activity, skin conductance, and pupil responses were also monitored. The results showed that extended exhalation slowed heart rate and was associated with riskier choices. This change appeared to stem from greater attention to possible rewards, not reduced concern about potential losses. Participants still responded to losses similarly. Stronger activity was detected in the ventromedial prefrontal cortex and the precuneus, brain regions involved in reward processing and heart rate variability.

This work supports neurovisceral models, which propose that a person's physical state can shape cognitive processes. Controlled breathing is simple, inexpensive, and relatively easy to learn. It could serve as a tool for everyday self-regulation. It may also have potential as a supportive, non-pharmacological approach in clinical settings. This includes conditions like anxiety disorders or depression, which involve disrupted autonomic regulation and altered responses to reward.

Future studies will investigate these effects in broader clinical populations, including individuals with overweight. Researchers are particularly interested in how breathing techniques could influence food-related decisions. Eating behavior is strongly affected by both reward processing and a person's physical state.