Casu, GiuliaBarajas-Smith, IsaiahBarr, AlanPhillips, BrandonKim, SunwookNussbaum, Maury A.Rempel, DavidPau, MassimilianoHarris-Adamson, Carisa2024-07-292024-07-292024-07-250003-6870S0003-6870(24)00134-0 (PII)https://hdl.handle.net/10919/120743Purpose: We investigated the influence of passive arm-support exoskeleton (ASE) with different levels of torque (50, 75, and 100%) on upper arm osteokinematics. Methods: Twenty participants completed a cyclic overhead drilling task with and without ASE. Task duration, joint angles, and angular acceleration peaks were analyzed during ascent and descent phases of the dominant upper arm. Results: Maximum ASE torque was associated with decreased peak acceleration during ascent (32.2%; SD 17.8; p < 0.001) and descent phases (38.8%; SD 17.8; p < 0.001). Task duration remained consistent. Increased torque led to a more flexed (7.2°; SD 5.5; p > 0.001) and internally rotated arm posture (17.6°; SD 12.1; p < 0.001), with minimal changes in arm abduction. Conclusion: The small arm accelerations and changes in osteokinematics we observed, support the use of this ASE, even while performing overhead cyclic tasks with the highest level of support.enCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 InternationalArm accelerationJoint anglesPassive exoskeletonArticle - Refereedhttps://doi.org/10.1016/j.apergo.2024.104357121Nussbaum, Maury [0000-0002-1887-8431]390590321872-9126