Therapeutic singing and expiratory muscle strength training in Parkinson's disease: a mixed methods comparison.
Jessy Brown, Elizabeth L Stegemöller
PMID 39640875WHAT IT FOUND
Expiratory muscle strength training and therapeutic singing produced no significant differences in quality of life, depression, or anxiety in people with Parkinson's disease.
Both interventions were highly adhered to, but quality of life scores worsened over time regardless of treatment.
Key findings
01There were no significant differences between expiratory muscle strength training and therapeutic singing for measures of quality of life, depression, or anxiety.
02Quality of life scores significantly worsened from baseline to the end of the study period.
03Adherence to both interventions was very high, with completion rates of 94% for singing and 99% for muscle training.
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 sample size was small (13 participants), limiting the power to detect subtle differences between interventions. The study population was relatively high-functioning with no baseline respiratory or cough concerns, which may not reflect the experience of patients with more advanced disease. Quality of life scores worsened over time, which the authors suggest may be due to the natural progression of Parkinson's disease or the burden of participating in the study, rather than the interventions themselves. There was a significant baseline difference in depression scores between the two groups, which may have confounded comparisons.
Declared interests
The authors declare no financial support was received for the research, authorship, or publication of this article.
The easy way to misread this
Do not interpret the worsening quality of life scores as evidence that these interventions are harmful. The authors suggest this decline likely reflects the natural progression of Parkinson's disease or the stress of study participation, as no adverse effects were reported and adherence remained high.