{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,27]],"date-time":"2025-11-27T00:12:30Z","timestamp":1764202350909,"version":"3.46.0"},"reference-count":82,"publisher":"Georg Thieme Verlag KG","funder":[{"DOI":"10.13039\/501100001871","name":"Portuguese Science and Technology\n                        Foundation","doi-asserted-by":"crossref","award":["SFRH\/BD\/146411\/2019"],"award-info":[{"award-number":["SFRH\/BD\/146411\/2019"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int J Sports Med"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Acute adaptations to fatiguing conditions may be altered concerning the training\n                    background. Muscle activation and coordination are affected by fatigue, although\n                    differences between subjects with different training status remain unclear. This\n                    study evaluated 28 individuals, investigating differences between\n                    strength-trained and untrained individuals in leg-press isometric maximum\n                    voluntary contractions before and after a back-squat fatiguing protocol. The\n                    peak force, rate of force development, electromyographic amplitude of seven\n                    lower-limb muscles, rate of electromyographic rise of agonist muscles and\n                    intermuscular coherence between synergist or antagonist pairs of muscles were\n                    evaluated. Strength-trained individuals exhibited a greater peak force, maximal\n                    rate of force development and rate of force development at 150\u2013200 ms. All\n                    force-related variables decreased with fatigue in both groups, and the peak\n                    force decreased to a greater extent in strength-trained individuals. The\n                    electromyographic amplitudes of the vastus medialis (p=0.005) and rectus femoris (p=0.039) increased in both groups, and the\n                    rate of electromyographic rise of the rectus femoris increased in\n                    strength-trained individuals but decreased in untrained individuals (time x\n                    group interactions: 0.006&lt;p&lt;0.025). Additionally, coherence\n                    analysis revealed greater coherence in the 15\u201335 Hz band between the rectus\n                    femoris and the vastus medialis in untrained individuals than in\n                    strength-trained individuals, while fatigue affected coherence across the bands\n                    of interest differently concerning the functional relationship between the\n                    paired muscles. Different training status imply different acute responses to\n                    fatigue relying on changes in the activation of agonist muscles as well as\n                    coordination between the pairs of synergist and\/or antagonist muscles.<\/jats:p>","DOI":"10.1055\/a-2734-2159","type":"journal-article","created":{"date-parts":[[2025,11,27]],"date-time":"2025-11-27T00:10:02Z","timestamp":1764202202000},"source":"Crossref","is-referenced-by-count":0,"title":["Fatigue- and Training-Related Differences in Muscle Activation and\n                    Coordination"],"prefix":"10.1055","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2074-722X","authenticated-orcid":false,"given":"Paulo D.","family":"G. Santos","sequence":"additional","affiliation":[{"name":"Neuromuscular Research Lab, Faculty of Human Kinetics,\n                    University of Lisbon, Lisbon, Portugal"},{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon,\n                    Lisbon, Portugal"}]},{"given":"Jo\u00e3o R.","family":"Vaz","sequence":"additional","affiliation":[{"name":"Egas Moniz Centre for Interdisciplinary Research\n                    (CiiEM), Egas Moniz School of Health & Science, Monte da Caparica,\n                    Portugal"}]},{"given":"Miguel","family":"Gomes","sequence":"additional","affiliation":[{"name":"Neuromuscular Research Lab, Faculty of Human Kinetics,\n                    University of Lisbon, Lisbon, Portugal"},{"name":"CIPER, Faculty of Human Kinetics, University of Lisbon,\n                    Lisbon, Portugal"}]},{"given":"Gustavo","family":"Bar\u00e3o","sequence":"additional","affiliation":[{"name":"Neuromuscular Research Lab, Faculty of Human Kinetics,\n                    University of Lisbon, Lisbon, Portugal"}]},{"given":"Jorge","family":"Infante","sequence":"additional","affiliation":[{"name":"SpertLab, Faculty of Human Kinetics, University of\n                    Lisbon, Lisbon, Portugal"}]},{"given":"Pedro","family":"Pezarat-Correia","sequence":"additional","affiliation":[{"name":"Egas Moniz Centre for Interdisciplinary Research\n                    (CiiEM), Egas Moniz School of Health & Science, Monte da Caparica,\n                    Portugal"}]}],"member":"194","published-online":{"date-parts":[[2025,11,26]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"675","DOI":"10.1007\/s00421-020-04567-3","article-title":"The knowns and unknowns of neural adaptations to resistance training","volume":"121","author":"J \u0160karabot","year":"2021","journal-title":"Eur J Appl Physiol"},{"key":"ref2","doi-asserted-by":"publisher","first-page":"S135","DOI":"10.1249\/00005768-198810001-00009","article-title":"Neural adaptation 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Rudroff","year":"2007","journal-title":"J Appl Physiol"},{"key":"ref27","doi-asserted-by":"publisher","first-page":"52","DOI":"10.1016\/j.jelekin.2016.02.002","article-title":"Fatigue- and training-related changes in \u2018beta\u2019 intermuscular interactions\n                    between agonist muscles","volume":"27","author":"C Charissou","year":"2016","journal-title":"J Electromyogr Kinesiol"},{"key":"ref28","doi-asserted-by":"publisher","first-page":"3401","DOI":"10.1152\/jn.1997.77.6.3401","article-title":"Cortical control of human motoneuron firing during isometric contraction","volume":"77","author":"S Salenius","year":"1997","journal-title":"J Neurophysiol"},{"key":"ref29","doi-asserted-by":"publisher","first-page":"3","DOI":"10.1111\/j.1469-7793.1998.003bo.x","article-title":"Rhythmicity, synchronization and binding in human and primate motor systems","volume":"509","author":"S F Farmer","year":"1998","journal-title":"J 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Chang","year":"2012","journal-title":"Sensor"},{"key":"ref33","doi-asserted-by":"publisher","first-page":"1933","DOI":"10.3389\/fphys.2018.01933","article-title":"Aging and strength training influence knee extensor intermuscular coherence\n                    during low- and high-force isometric contractions","volume":"9","author":"S Walker","year":"2019","journal-title":"Front Physiol"},{"key":"ref34","doi-asserted-by":"publisher","first-page":"855","DOI":"10.3389\/fnhum.2013.00855","article-title":"The potential of corticomuscular and intermuscular coherence for research on\n                    human motor control","volume":"7","author":"T W Boonstra","year":"2013","journal-title":"Front Hum Neurosci"},{"key":"ref35","doi-asserted-by":"publisher","first-page":"362","DOI":"10.1111\/apha.12111","article-title":"Eccentric muscle damage increases intermuscular coherence during a fatiguing\n                    isometric contraction","volume":"208","author":"J G Semmler","year":"2013","journal-title":"Acta Physiol (Oxf)"},{"key":"ref36","doi-asserted-by":"publisher","first-page":"303","DOI":"10.1249\/MSS.0b013e3181edfa96","article-title":"Effects of strength training on muscle fatigue mapping from surface EMG and\n                    blood metabolites","volume":"43","author":"M Izquierdo","year":"2011","journal-title":"Med Sci Sports Exercise"},{"key":"ref37","doi-asserted-by":"publisher","first-page":"361","DOI":"10.1016\/s1050-6411(00)00027-4","article-title":"Development of recommendations for SEMG sensors and sensor placement\n                    procedures","volume":"10","author":"H J Hermens","year":"2000","journal-title":"J Electromyogr Kinesiol"},{"key":"ref38","doi-asserted-by":"publisher","first-page":"743","DOI":"10.1111\/cpf.12495","article-title":"Physiological and methodological aspects of rate of force development assessment\n                    in human skeletal muscle","volume":"38","author":"D Rodr\u00edguez-Rosell","year":"2018","journal-title":"Clin Physiol Funct Imaging"},{"key":"ref39","doi-asserted-by":"publisher","first-page":"402","DOI":"10.1152\/japplphysiol.00477.2006","article-title":"Adaptations in the activation of human skeletal muscle induced by short-term\n                    isometric resistance training","volume":"103","author":"C Del Balso","year":"2007","journal-title":"J Appl Physiol"},{"key":"ref40","doi-asserted-by":"publisher","first-page":"145","DOI":"10.1139\/apnm-2017-0310","article-title":"Isometric parameters in the monitoring of maximal strength, power, and\n                    hypertrophic resistance-training","volume":"43","author":"H Peltonen","year":"2018","journal-title":"Appl Physiol Nutr Metab"},{"key":"ref41","doi-asserted-by":"publisher","first-page":"e343","DOI":"10.1111\/sms.12186","article-title":"Muscle conduction velocity, strength, neural activity, and morphological changes\n                    after eccentric and concentric 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