Ib ls

The FRA system is a composite and comprehensive assessment tool developed to predict the risk of falls. It is composed of three parts: a balance measuring instrument, a body composition analyzer, and a leg muscle dynamometer (Fig. 1). The modified clinical test of sensory interaction in balance (mCTSIB), reaction time and latent reaction time tests, and integrated balance ability test were performed with the balance measuring instrument (FRA510S and IB-LS; InBody Co. Ltd., Seoul, Korea). Leg muscle mass was with the body composition analyzer (InBody 570). Leg muscle strength tests were performed on the leg muscle dynamometer (IB-LS).

The leg muscle mass was measured using the InBody body composition analyzer, which uses the bioelectrical impedance analysis. The lean mass of both legs was obtained as the leg muscle mass score. Muscle strengths as isokinetic knee extension and flexion were measured twice for each leg and twice for both legs (extension at 60° angle and flexion at 30° angle) using a leg strength dynamometer (IB-LS, InBody Co., Ltd.). The maximum of the 2 measured values was considered in the analysis. The musculoskeletal score was derived from the mean of the leg muscle mass score and the composite leg muscle strength score.