{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T03:32:27Z","timestamp":1768447947601,"version":"3.49.0"},"reference-count":51,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2022,10,20]],"date-time":"2022-10-20T00:00:00Z","timestamp":1666224000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Institut Robert-Sauv\u00e9 en Sant\u00e9 et S\u00e9curit\u00e9 du Travail (IRSST)","award":["2017_0016"],"award-info":[{"award-number":["2017_0016"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Muscle fatigue is a risk factor for developing musculoskeletal disorders during low-load repetitive tasks. The objective of this study was to assess the effect of muscle fatigue on power spectrum changes of upper limb and trunk acceleration and angular velocity during a repetitive pointing task (RPT) and a work task. Twenty-four participants equipped with 11 inertial measurement units, that include acceleration and gyroscope sensors, performed a tea bag filling work task before and immediately after a fatiguing RPT. During the RPT, the power spectrum of acceleration and angular velocity increased in the movement and in 6\u201312 Hz frequency bands for sensors positioned on the head, sternum, and pelvis. Alternatively, for the sensor positioned on the hand, the power spectrum of acceleration and angular velocity decreased in the movement frequency band. During the work task, following the performance of the fatiguing RPT, the power spectrum of acceleration and angular velocity increased in the movement frequency band for sensors positioned on the head, sternum, pelvis, and arm. Interestingly, for both the RPT and work task, Cohens\u2019 d effect sizes were systematically larger for results extracted from angular velocity than acceleration. Although fatigue-related changes were task-specific between the RPT and the work task, fatigue systematically increased the power spectrum in the movement frequency band for the head, sternum, pelvis, which highlights the relevance of this indicator for assessing fatigue. Angular velocity may be more efficient to assess fatigue than acceleration. The use of low cost, wearable, and uncalibrated sensors, such as acceleration and gyroscope, in industrial settings is promising to assess muscle fatigue in workers assigned to upper limb repetitive tasks.<\/jats:p>","DOI":"10.3390\/s22208008","type":"journal-article","created":{"date-parts":[[2022,10,21]],"date-time":"2022-10-21T00:34:30Z","timestamp":1666312470000},"page":"8008","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Power Spectrum of Acceleration and Angular Velocity Signals as Indicators of Muscle Fatigue during Upper Limb Low-Load Repetitive Tasks"],"prefix":"10.3390","volume":"22","author":[{"given":"B\u00e9atrice","family":"Moyen-Sylvestre","sequence":"first","affiliation":[{"name":"Institute of Biomedical Engineering, Universit\u00e9 de Montr\u00e9al, Montreal, QC H3T 1J4, Canada"}]},{"given":"\u00c9tienne","family":"Goubault","sequence":"additional","affiliation":[{"name":"School of Kinesiology and Physical Activity Science, Universit\u00e9 de Montr\u00e9al, Montreal, QC H3T 1J4, Canada"}]},{"given":"Micka\u00ebl","family":"Begon","sequence":"additional","affiliation":[{"name":"Institute of Biomedical Engineering, Universit\u00e9 de Montr\u00e9al, Montreal, QC H3T 1J4, Canada"},{"name":"School of Kinesiology and Physical Activity Science, Universit\u00e9 de Montr\u00e9al, Montreal, QC H3T 1J4, Canada"},{"name":"Centre de Recherche du CHU Sainte-Justine, Montreal, QC H3T 1C5, Canada"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6155-8946","authenticated-orcid":false,"given":"Julie N.","family":"C\u00f4t\u00e9","sequence":"additional","affiliation":[{"name":"Department of Kinesiology and Physical Education, McGill University, Montreal, QC H3A 0G4, Canada"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1083-5899","authenticated-orcid":false,"given":"Jason","family":"Bouffard","sequence":"additional","affiliation":[{"name":"Department of Kinesiology, Universit\u00e9 Laval, Quebec, QC G1V 0A6, Canada"}]},{"given":"Fabien","family":"Dal Maso","sequence":"additional","affiliation":[{"name":"School of Kinesiology and Physical Activity Science, Universit\u00e9 de Montr\u00e9al, Montreal, QC H3T 1J4, Canada"},{"name":"Centre Interdisciplinaire de Recherche sur le Cerveau et l\u2019Apprentissage, Montreal, QC H7N 0A5, Canada"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,20]]},"reference":[{"key":"ref_1","unstructured":"Michel, C., Arcand, R., Crevier, H., Dovonou, N., Martin, R., Pelletier, P., and Phaneuf, R. 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