Characteristics of Gait Event and Muscle Activation Parameters of the Lower Limb on the Affected Side in Patients With Hemiplegia After Stroke: A Pilot Study.
Jeong-Woo Seo, Geon-Hui Kang, Cheol-Hyun Kim and 4 others
PMID 38163027WHAT IT FOUND
After stroke, the affected leg had longer swing time and shorter stance phase.
Only medial gastrocnemius median power frequency differed; most muscle measures did not.
Key findings
01Four gait event parameters differed between sides: swing time, stance phase, swing phase, and single support phase.
02The gastrocnemius medialis median power frequency was about 17 Hz lower on the affected side.
03The logistic model reported 74.14% accuracy, but no separate test set checked it.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only 29 patients were included, giving 58 side-level data points for the model. The classification model had no separate test set, so its 74.14% accuracy may have overfitted the training data. EMG results were difficult to generalize because individual abnormal activation patterns and muscle types may have influenced them. Joint angles were measured only in standing, not during walking, so walking knee and hip mechanics could not be directly compared.
The easy way to misread this
Do not use the 74.14% accuracy as a clinical test. The model was built from 29 patients with 58 side-level data points, had no separate test set, and may have overfitted.