TY - RPRT TI - Active trunk stiffness increases with co-contraction. AU - Patrick J Lee AU - Ellen L Rogers AU - Kevin P Granata PY - 2005 DO - 10.1016/j.jelekin.2005.06.006 UR - https://pubmed.ncbi.nlm.nih.gov/16099678/ ID - 16099678 ER -