{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T07:20:54Z","timestamp":1792653654343,"version":"4.5.0"},"reference-count":62,"publisher":"Walter de Gruyter GmbH","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,4,28]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Standing up and sitting down movements are important prerequisites to achieve functional independence in everyday life of spinal cord injury (SCI) patients. Thus, mechanomyography (MMG) was proposed as a safe monitoring tool to evaluate muscle function performance of these activities. Two incomplete SCI participants performed repetitive sit-to-stand (SitTS) and stand-to-sit (StandTS) until fatigued challenge. Three sets of these activities were completed with MMG sensors attached over the quadriceps muscles of both legs. A 5-min rest was allocated between each set, totalling 399 trials of SitTS and StandTS activities. There was a significant difference between MMG\u2019s mean root mean square maximum (RMS<jats:sub>max<\/jats:sub>) in SitTS and StandTS activities (p\u2009=\u20090.014). The mean values of RMS<jats:sub>max<\/jats:sub> and root mean square average (RMS<jats:sub>ave<\/jats:sub>) on the right leg were detected to be significantly higher compared to those of the left leg during these activities (p\u2009&lt;\u20090.05). In the frequency domain, MMG\u2019s mean power frequency (MPF) proved to be significantly higher at the beginning compared to the end of the three sets of both activities (p\u2009=\u20090.000). These muscle performances during both activities can be verified based on the analysis of MMG behaviour in time and frequency domains. Furthermore, this study indicated that MMG can be used as a monitoring tool to identify muscle fatigue throughout a prolonged event.<\/jats:p>","DOI":"10.1515\/bmt-2018-0200","type":"journal-article","created":{"date-parts":[[2019,9,27]],"date-time":"2019-09-27T09:03:01Z","timestamp":1569574981000},"page":"175-181","source":"Crossref","is-referenced-by-count":4,"title":["Mechanomyography-based assessment during repetitive sit-to-stand and stand-to-sit in two incomplete spinal cord-injured individuals"],"prefix":"10.1515","volume":"65","author":[{"given":"Musfirah","family":"Abd Aziz","sequence":"first","affiliation":[{"name":"Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nur Azah","family":"Hamzaid","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nazirah","family":"Hasnan","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muhammad Afiq","family":"Dzulkifli","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"374","reference":[{"key":"ref61","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1310\/tsr2103-197","article-title":"Clinimetric properties of the timed up and go test for patients with stroke: a systematic review","volume":"21","year":"2014","journal-title":"Top Stroke Rehabil"},{"key":"ref221","doi-asserted-by":"crossref","first-page":"50","DOI":"10.3389\/fnbot.2018.00050","article-title":"Neural network-based muscle torque estimation using mechanomyography during electrically-evoked knee extension and standing in spinal cord injury","volume":"12","year":"2018","journal-title":"Front Neurorobot"},{"key":"ref451","first-page":"12","article-title":"Mechanomyogram for muscle function assessment: a review","volume":"8","year":"2013","journal-title":"PLoS One"},{"key":"ref401","doi-asserted-by":"crossref","first-page":"212","DOI":"10.1179\/2045772313Y.0000000139","article-title":"Discriminative ability of the three functional tests in independent ambulatory patients with spinal cord injury who walked with and without ambulatory assistive devices","volume":"37","year":"2014","journal-title":"J Spinal Cord Med"},{"key":"ref501","first-page":"8","article-title":"The crucial changes of sit-to-stand phases in subacute stroke survivors identified by movement decomposition analysis","volume":"9","year":"2018","journal-title":"Front Neurol"},{"key":"ref371","first-page":"11","article-title":"Improving stand-to-sit maneuver for individuals with spinal cord injury","volume":"13","year":"2016","journal-title":"J Neuroeng Rehabil"},{"key":"ref171","doi-asserted-by":"crossref","first-page":"485","DOI":"10.1080\/02701367.2002.10609050","article-title":"Single versus multiple sets for strength: a meta-analysis to address the controversy","volume":"73","year":"2002","journal-title":"Res Q Exerc Sport"},{"key":"ref601","doi-asserted-by":"crossref","first-page":"66","DOI":"10.1111\/j.1749-6632.2010.05806.x","article-title":"Bone and muscle loss after spinal cord injury: organ interactions","volume":"1211","year":"2010","journal-title":"Ann N Y Acad Sci"},{"key":"ref21","doi-asserted-by":"crossref","first-page":"355","DOI":"10.1191\/0269215503cr620oa","article-title":"A randomized controlled trial of the effects of intensive sit-to-stand training after recent traumatic brain injury on sit- to-stand performance","volume":"17","year":"2003","journal-title":"Clin Rehabil"},{"key":"ref381","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1310\/tsr2103-197","article-title":"Clinimetric properties of the timed up and go test for patients with stroke: a systematic review","volume":"21","year":"2014","journal-title":"Top Stroke Rehabil"},{"key":"ref561","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1007\/s11517-007-0301-z","article-title":"A chair with a platform setup to measure the forces under each thigh when sitting, rising from a chair and sitting down","volume":"46","year":"2008","journal-title":"Med Biol Eng Comput"},{"key":"ref301","first-page":"1","article-title":"Does the frequency content of the surface mechanomyographic signal reflect motor unit firing rates? 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