TITLE Return - to - play according to GAP in muscle injuries by L - BIA measurements : clinical prognosis

Introduction and Purpose The muscle injury grading systems are based in part on ultrasound (US) and magnetic resonance imaging (MRI). However, the prognosis by MRI is not clear. There is evidence that part of the return-to-play is conditioned by the severity of the injury [1], and in our experience, this severity is associated with muscle gap (quantifiable retraction between fibers). Recently, a new classification of muscle injury has been proposed [2] in which the gap plays an important role, with the drawback that it is difficult to identify by MRI. The localized bioimpedance measurement (LBIA) emerges as alternative, low-cost or accessible technique for supporting the US and MRI to quantify the disrupted soft tissue structure in muscle injuries [3]. The aim of this work is to relate the return-to-play with the severity of the injury according to the gap, through L-BIA measurements.