ArticleJournal of clinical medicine2026
Bioelectrical Recovery After Knee Injury in an Elite Alpine Skier: A Longitudinal 19-Frequency Bioelectrical Impedance Vector Analysis Case Report.
Article in Journal of clinical medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors.
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Abstract
Return-to-play (RTP) decisions after severe knee injury in elite athletes remain challenging because functional recovery may not coincide with physiological tissue recovery. This longitudinal case report evaluated Advanced 19-Frequency Bioelectrical Impedance Vector Analysis (A19FBIVA) as a non-invasive sensor-based approach for monitoring segmental lower-limb bioelectrical changes in an elite female alpine skier following a complex right knee injury. Segmental resistance (R), reactance (Xc), phase angle (PhA), and inter-limb asymmetry were assessed with a Seca mBCA 515 analyzer at 19 frequencies (1-1000 kHz) at four time points: 5 days pre-injury, 26 days post-injury, 64 days post-injury, and 135 days post-injury. The rare pre-injury baseline enabled individualized comparison beyond contralateral symmetry. At the final late-stage rehabilitation follow-up, R in the injured lower-limb segment had normalized or improved, whereas Xc and PhA remained suppressed, indicating an observational bioelectrical pattern consistent with persistent capacitance-related impairment rather than direct evidence of localized knee-tissue healing. The uninjured limb also deteriorated during early rehabilitation, demonstrating that contralateral comparison alone may underestimate residual deficits. These findings support the exploratory concept of a 'reactance lag' and indicate that A19FBIVA may provide a useful complementary monitoring layer, alongside clinical examination, imaging, functional testing, and sport-specific assessment. Larger prospective studies are required to validate thresholds, reliability, and prognostic value.
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