A randomized trial in Türkiye found that a structured laughter routine reduced breathlessness in people with chronic obstructive pulmonary disease about as effectively as pursed-lip breathing, the technique clinicians have taught for decades. The effect was still present a month after the eight-week program ended.
The comparison is what makes the result worth reporting accurately. This was not laughter beating standard care. It was laughter performing similarly to an established exercise, with both outperforming a group that did no breathing exercises. Reading it as superiority inverts the finding.
