Impact of positive expiratory pressure buddy during exercise on chronic obstructive pulmonary disease patients' functional performance, lung function, and sleep quality: a randomized controlled trial.
Mushabbab A Alahmari, Marwa M Elsayed, Hany F Elsisi and 1 others
PMID 41159521WHAT IT FOUND
Adding a hands-free expiratory pressure device to treadmill training for eight weeks improved breathlessness, lung function, walking distance, and sleep quality more than exercise alone.
Both groups took prescribed medications, so the device's specific contribution is mixed with standard care and exercise.
Key findings
01Participants using the PEP-Buddy device during aerobic exercise reported a 72.38% reduction in dyspnea scores, compared to a 34.58% reduction in the control group.
02The experimental group showed significantly greater improvements in FEV1 (31.41% vs 5.13%) and FEV1/FVC ratio (18.09% vs 3.23%) than the control group.
03Sleep quality and quality of life improved more in the experimental group, with sleep scores dropping by 53.33% versus 13.72% in controls.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The study did not measure maximal expiratory pressure, so it is unclear if the benefits were due to actual muscle strength gains or other mechanisms. Daytime napping and activity were not controlled for, which could have influenced the sleep quality results. The follow-up period was only eight weeks, so long-term sustainability of these improvements is unknown. The sample size was small (60 participants), limiting the generalizability of the findings.
Declared interests
The authors declared no conflicts of interest. The study was funded by the Deanship of Graduate Studies and Scientific Research at University of Bisha.
The easy way to misread this
Do not assume the device alone caused the improvement. Both groups received eight weeks of supervised aerobic exercise and continued their prescribed medications. The study shows the device adds benefit to this combined regimen, not that it replaces exercise or medication.