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These included symmetrical\/asymmetrical, ascending\/descending lifts that varied in start-to-end heights (knee-to-waist and waist-to-shoulder). We used a data-driven musculoskeletal model that combined force and motion data with a muscle activation-informed solver (OpenSim, CEINMS) to estimate 3-dimensional internal joint contact forces (JCFs) in the lower back (L5\/S1) and knee. Symmetrical lifting resulted in larger peak JCFs than asymmetrical lifting in both the L5\/S1 (+20.2% normal [<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.01], +20.3% shear [<jats:italic>P<\/jats:italic>\u2009=\u2009.001], +20.6% total [<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.01]) and the knee (+39.2% shear [<jats:italic>P<\/jats:italic>\u2009=\u2009.001]), and there were no differences in peak JCFs between ascending versus descending motions. Below-the-waist lifting generated significantly greater JCFs in the L5\/S1 and knee than above-the-waist lifts (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.01). We found a positive correlation between knee and L5\/S1 peak total JCFs (R<jats:sup>2<\/jats:sup>\u2009=\u2009.60, <jats:italic>P<\/jats:italic>\u2009&lt;\u2009.01) across the task space, suggesting motor coordination that favors sharing of load distribution across the trunk and legs during lifting.<\/jats:p>","DOI":"10.1123\/jab.2023-0292","type":"journal-article","created":{"date-parts":[[2025,1,13]],"date-time":"2025-01-13T19:30:08Z","timestamp":1736796608000},"page":"151-160","source":"Crossref","is-referenced-by-count":3,"title":["Electromyography-Informed Estimates of Joint Contact Forces Within the Lower Back and Knee Joints During a Diverse Set of Industry-Relevant Manual Lifting Tasks"],"prefix":"10.1123","volume":"41","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1186-0490","authenticated-orcid":true,"given":"Felicia R.","family":"Davenport","sequence":"first","affiliation":[{"name":"Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4435-4121","authenticated-orcid":true,"given":"Jennifer K.","family":"Leestma","sequence":"additional","affiliation":[{"name":"Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA"},{"name":"Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adriana","family":"Staten","sequence":"additional","affiliation":[{"name":"Wallace H. 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