Effects of Lee Silverman Voice Treatment-BIG on Motor, Cognition, Mental Health, Occupational Performance, and Occupational Balance in Patients With Schizophrenia: A Single-Subject Experimental Study.
Woo-Hyuk Jang, Sang-Min Seo, Si-Hyun Kim
PMID 40018069WHAT IT FOUND
Three men with chronic schizophrenia improved their walking speed, balance, and cognitive scores after four weeks of LSVT-BIG.
They also reported better performance in daily tasks and higher occupational balance. This pilot suggests the therapy may help motor and mental symptoms, but evidence is limited to three people.
Key findings
01All three participants showed significant improvements in Functional Reach Test scores, and two showed significant improvements in Timed Up and Go times.
02All three participants demonstrated statistically significant increases in cognitive function scores on the MoCA.
03All participants reported subjective decreases in cognitive and mental symptoms, and improvements in task performance and occupational balance satisfaction.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study included only three participants, making it impossible to generalize the findings to the wider population of patients with schizophrenia. There was no control group or comparison intervention, so natural fluctuations or placebo effects cannot be ruled out. The specific mechanisms linking motor improvements to cognitive or psychiatric benefits were not analyzed. Medication status and dopamine concentrations were not monitored, which could influence motor and cognitive outcomes. The follow-up period was short (only two sessions), so the durability of the effects is unknown.
Declared interests
No specific funding or conflict of interest statements were provided in the text.
The easy way to misread this
Do not assume LSVT-BIG is an evidence-based treatment for schizophrenia. The improvements were seen in only three people without a control group, and the study design cannot rule out other factors like natural variation or the effects of regular social interaction and exercise itself.