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Exhaling May Speed Up Reaction Times

A recent experiment suggests that whether a person is inhaling or exhaling can influence their reaction time to a visual cue.

Volunteers' reaction times were found to be faster when they were exhaling or holding their breath compared to when they were inhaling, according to research published in iScience.

The discovery was made by Ken Paller and Erika Yamazaki at Northwestern University while studying breathing patterns for sleep apnea treatments. They used a simple reaction-time test where participants clicked a button when a red square turned yellow.

On average, reaction times were 41 milliseconds faster during exhalation than inhalation, a difference that persisted regardless of the volunteers' sleepiness or alertness.

While this difference may seem small, it could be significant in time-sensitive events like sprint races.

However, the relationship between breath and brain activity is complex. A 2016 study found faster reaction times during inhalation for tasks requiring more cognitive processing, such as facial recognition, unlike the simple cue response in the recent experiment.

The exact mechanism behind these findings is not yet clear, but researchers suggest it may be related to the synchronization of breathing with brain waves.

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