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Immediate effect of voluntary-induced stepping response training on protective stepping in persons with chronic
Pornprom Chayasit1, Kristen Hollands2, Mark Hollands3
1Faculty of Physical Therapy, Srinakharinwirot University, Nakhon Nayok, Thailand.
Purpose:
To compare the immediate effects of voluntary-induced stepping response training (VSR) and DynSTABLE perturbation training (DST) on protective stepping in patients with stroke.
Methods:
A randomized controlled trial (registration number: TCTR20170827001) was conducted in 34 patients with chronic stroke who were randomly allocated to the VSR (n = 17) or DST (n = 17) group. The VSR group was instructed to lean forward to induce protective stepping, while the DST group experienced support surface translation. All participants received one session of training (3 set, 10 min for each set with 10-minute rest in between). Step length, step width, number of steps and center of mass (CoM) position during protective stepping were assessed using a computer-assisted rehabilitation environment (CAREN) system prior to and immediately after training. Two-way ANOVA was used to compare between groups and times.
Results:
Both types of training resulted in an increase in step width, but step length increased and there was a more positive COM position exhibited following DST (p < .05) than following VSR. Single-step incidence increased, whereas multiple-step incidence decreased significantly in both groups. Only participants in the VSR group generated protective stepping with the affected leg in a larger percentage of trials (27%) after training than before training.
Conclusion:
Both DST and VSR led to changes in protective stepping parameters after a single session of training. VSR may be a feasible alternative to equipment-based training but requires further study.Implication for RehabilitationVSR and DST trainings improved protective stepping in stroke.Step length and CoM control at foot touchdown increased after DST training.VSR training for 50 minutes led to increase affected stepping and reduce grasping.Step width, affected step length, and single step increased after both trainings.Without instrument, VSR increased steps execution and performance similar to DST.
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