The inertial-based gait normalcy index of dual task cost during turning quantifies gait automaticity improvement in early-stage Parkinson's rehabilitation.
Lin Meng, Yu Shi, Hongbo Zhao and 3 others
PMID 39300485WHAT IT FOUND
A new turning-based dual-task index detected gait automaticity changes after 12 weeks of action observation training in early Parkinson's, while standard walking speed and dual-task cost measures showed no group difference.
Balance and quality of life also improved more with training.
Key findings
01The turning-based dual-task cost normalcy index (NIDTC_T) showed a significant group-by-time interaction, decreasing in the action observation training group and increasing in the stretching control group.
02Standard gait measures, including single spatiotemporal parameters and individual dual-task costs, showed no significant group-by-time interactions, meaning they failed to distinguish the two interventions.
03The NIDTC_T had the largest effect size (Cohen’s d = 0.968) for distinguishing rehabilitation changes between the groups, compared to balance and quality of life scales.
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 had a small sample size (28 analysed), which limits generalizability. The NIDTC is a newly proposed index; its test-retest reliability and inter-rater reliability were not established in this study. The control group received stretching, which is an active intervention, so the effect of AOT versus no treatment is not isolated. The study was conducted in a controlled indoor environment using specific inertial sensors, which may not translate to routine clinical practice without similar equipment.
Declared interests
The study was funded by the National Natural Science Foundation of China, the National Key Research and Development Program of China, the Tianjin Key Medical Discipline Construction Project, and the Tianjin Natural Science Foundation. No commercial conflicts of interest are reported.
The easy way to misread this
Do not interpret the significant change in the NIDTC_T as proof that action observation training is superior to stretching for overall motor function. The primary clinical measure of motor severity (UPDRS-III) did not show a significant difference between groups, and the NIDTC is a research index that has not yet been validated for routine clinical use.