The Most Suitable Test Method for Postural Control Evaluation: Correlation of Functional Reach Test and Modifications with Limits of Stability

Abstract

Purpose: To evaluate the correlation of Functional Reach Test (FRT) and its modified versions (mFRTs) with the outcomes of Limits of Stability (LOS), and to identify the most appropriate test method to use in postural control assessment. Methods: 30 participants were included in the study. The participants performed FRT and mFRTs: firm ground dominant arm (FRT), firm ground both arms (FRTFB), soft ground dominant arm (FRTSD), soft ground both arms (FRTSB) and firm ground lateral FRTs. LOS was carried out with static posturography. The correlation of FRT and mFRTs with LOS parameters was evaluated as reaching distance and movement time. Results: A strong positive correlation was found between FRTFB and LOS-I endpoint excursion and maximum excursion (p