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Low back joint and muscle forces estimated from a musculoskeletal model during asymmetric and symmetric gaits were compared. Our results indicated that normalized peak low back forces were mostly not impacted by gait asymmetry except when carrying the higher 15% load alone in the hand contralateral to the walking boot. Raw peak L5\/S1 intervertebral joint compression (1291\u20133551\u00a0N) and shear (181\u2013604\u00a0N) forces during all carrying tasks were below spinal unit tissue injury tolerances for manual materials handling. Future work should look to examine nonbiomechanical factors, alternative sources or levels of asymmetry, or other daily tasks that could contribute to low back pain in those with gait asymmetries.<\/jats:p>","DOI":"10.1123\/jab.2025-0254","type":"journal-article","created":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T15:48:48Z","timestamp":1786981728000},"page":"1-10","source":"Crossref","is-referenced-by-count":0,"title":["Low Back Forces During Load Carriage in Asymmetrical Gait"],"prefix":"10.1123","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6984-5584","authenticated-orcid":true,"given":"Jacob J.","family":"Banks","sequence":"first","affiliation":[{"name":"Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA"},{"name":"Baxter International, Batesville, IN, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5947-4057","authenticated-orcid":true,"given":"Katherine A.","family":"Boyer","sequence":"additional","affiliation":[{"name":"Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5780-2405","authenticated-orcid":true,"given":"Brian R.","family":"Umberger","sequence":"additional","affiliation":[{"name":"School of Kinesiology, University of Michigan, Ann Arbor, MI, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Graham E.","family":"Caldwell","sequence":"additional","affiliation":[{"name":"Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"1","key":"r1","series-title":"Gait Posture","doi-asserted-by":"publisher","first-page":"34","DOI":"10.1016\/S0966-6362(00)00070-9","article-title":"Symmetry and limb dominance in able-bodied gait: a review","volume":"12","author":"Sadeghi H","year":"2000","unstructured":"Sadeghi H, Allard P, Prince F, Labelle H. 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