Immediate impact of extremity manipulation on dual task performance: a randomized, crossover clinical trial

Abstract Background Previous research demonstrated that manipulation of the extremities was associated with changes in multisegmental postural sway as well improvement a lower extremity balancing task. We were interested if these effects would extend to an upper Our aim this study investigate whether could influence dual task performance where explicit suprapostural water filled tube frontal plane. Methods Participants healthy volunteers (aged 21–32 years). Upper- or lower-extremity manipulations delivered participant and assessor blinded, randomized crossover, clinical trial. Postural (center pressure) (tube motion) measurements plane made pre-post under eyes open closed conditions using BTrackS™ force plate Shimmer inertial measurement unit, respectively. Pathlength, range, root mean square sample entropy calculated describe each signal during performance. Results There no main effect vision for motion). However, follow-up interaction indicates roll pathlength, range means motion all decreased (improvement) following open. Regarding task, there on mediolateral center pressure such pathlength reduced both larger decreases values manipulation. Conclusion findings show enhanced stability (e.g. stabilization standing balance) This furthers argument site-specific context specific motor behavior/coordination. focused only immediate manipulation, caution is urged generalizing results longer time frames until more work has been done examining length last. Trial registration Clinicaltrials.gov , NCT03877367 Registered 15 March 2019. Data collection took place July