Relationship between gait quality measures and modular neuromuscular control parameters in chronic post-stroke individuals.
Sung Yul Shin, Yusung Kim, Arun Jayaraman and 1 others
PMID 33827607WHAT IT FOUND
People walking after chronic stroke who had fewer muscle modules walked slower and showed more asymmetry in limb length, footpath area, hip side-to-side motion and knee bending.
This was an observational study, so it does not show that increasing modules improves walking.
Key findings
01In 16 chronic post-stroke participants, the total number of muscle modules averaged 4.37, with a minimum of two and a maximum of six.
02The total number of modules was significantly associated with gait speed and with symmetry of limb length, footpath area, hip abduction/adduction and knee flexion/extension (all p < 0.05).
03Affected-side rectus femoris activity and affected-side module reconstruction quality were selected as predictors for several asymmetry measures.
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What it does not show
The study included only a small group of people with chronic stroke who could walk independently, so it may not apply to people who need assistance or who walk very slowly. The findings are associations measured at one time, not proof that fewer modules cause worse walking. No treatment was tested, so the study cannot show that increasing muscle modules improves walking. Some predictors, such as variability accounted for, are technical and have limited straightforward clinical meaning. Muscle activity was recorded from a limited set of lower-limb muscles, mainly related to sagittal-plane motion.
Declared interests
The supplied text reports funding from KAIST's Global Singularity Research Program for 2019 and does not state author conflicts.
The easy way to misread this
Do not conclude that training more muscle modules will improve walking. This study measured an association in a small group at one time and did not test an intervention.