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However, workstation designers generally only have at their disposal the imprecise and sparse estimates of these quantities provided with digital manikin digital human model (DHM) software. For instance, such tools consider only static postures and ignore important specificities of the human musculoskeletal system such as interjoints couplings. To alleviate the weaknesses of existing approaches implemented in digital human modeling tools relying on torque databases, this paper describes a methodology based on a class of polytopes called zonotopes and musculoskeletal simulation to assess maximum actuation torques. It has two main advantages, the ability to estimate maximum joint torques for any posture and taking into account musculoskeletal specificities unlike existing digital human modeling tools. As a case study, it also compares simulated maximum actuation torques to those recorded during an experiment described in the literature, focusing on an isometric task of the upper limb. This simulation has led to similar or smaller errors than DHM software tools. Hence, this methodology may help in interpreting interjoint couplings, choosing appropriate mathematical models or design experimental protocols. It may also be implemented in DHM software to provide designers with more comprehensive and more reliable data.<\/jats:p>","DOI":"10.1115\/1.4064661","type":"journal-article","created":{"date-parts":[[2024,2,6]],"date-time":"2024-02-06T09:57:56Z","timestamp":1707213476000},"update-policy":"https:\/\/doi.org\/10.1115\/crossmarkpolicy-asme","source":"Crossref","is-referenced-by-count":0,"title":["simMACT, a Software Demonstrator to Improve Maximum Actuation Joint Torques Simulation for Ergonomics Assessment"],"prefix":"10.1115","volume":"146","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7479-7898","authenticated-orcid":false,"given":"Jonathan H.","family":"Savin","sequence":"first","affiliation":[{"name":"CPI Laboratory, Working Equipment Engineering Department, INRS , Vandoeuvre-l\u00e8s-Nancy 54500, France"},{"id":[{"id":"https:\/\/ror.org\/01dg85j68","id-type":"ROR","asserted-by":"publisher"}],"name":"Institut National de Recherche et de S\u00e9curit\u00e9"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nasser","family":"Rezzoug","sequence":"additional","affiliation":[{"name":"RoBioSS Team, PPrime Institute, CNRS-University of Poitiers-ENSMA , UPR 3346, 86073 Poitiers cedex 9, France"},{"id":[{"id":"https:\/\/ror.org\/05vjdsn22","id-type":"ROR","asserted-by":"publisher"}],"name":"Institut Pprime"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"33","published-online":{"date-parts":[[2024,2,23]]},"reference":[{"issue":"s679","key":"2024040809301518200_bib1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1111\/j.1748-1716.2010.02145.x","article-title":"On Functional Motor Adaptations: From the Quantification of Motor Strategies to the Prevention of Musculoskeletal Disorders in the Neck\u2013Shoulder Region","volume":"199","year":"2010","journal-title":"Acta Physiol."},{"issue":"2","key":"2024040809301518200_bib2","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1080\/00140139.2016.1208848","article-title":"Musculoskeletal Disorders as a Fatigue Failure Process: Evidence, Implications and Research Needs","volume":"60","year":"2017","journal-title":"Ergonomics"},{"key":"2024040809301518200_bib3","volume-title":"Directive 2006\/42 of the European Parliament and of the Council on Machinery","year":"2006"},{"issue":"1\u20132","key":"2024040809301518200_bib4","first-page":"101","article-title":"Human Muscle Strength Definitions, Measurement, and Usage: Part I\u2013Guidelines for the Practitioner","volume":"22","year":"1998","journal-title":"Int. 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