Electrical bioimpedance spectral markers distinguish balance ability in older adults without provoking fall risk.

The analysis included only 25 older adults who were already active and motivated because they came from a fall-prevention training programme, so the results may not apply to frailer or less engaged older adults. The study compared people who passed or failed single-leg stance, but it did not follow them for falls, so it cannot show that these impedance features predict fall risk. No concurrent electromyography, motion sensors, or force plates were recorded, so the observed impedance differences cannot be tied to a specific muscle or balance mechanism. Each posture was recorded once in a fixed order, and test-retest reliability was not assessed, so order, fatigue, electrode placement, or skin contact could influence the features. The passed and failed groups were unequal, and the sample was small, so effect estimates remain imprecise. Balance ability was defined from the same leg that was measured, so the study cannot separate a general balance problem from a limb-specific muscle characteristic. The features are laboratory signal measures, not a validated clinical score, and no multivariate screening tool was tested.

The paper names Mälardalen University as the funder. The supplied text does not provide further conflict-of-interest declarations.

Do not conclude that these impedance markers predict falls or can replace balance tests. The study compared people who passed or failed single-leg stance, did not follow participants for falls, and used a small convenience sample without reliability testing.