{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T14:40:50Z","timestamp":1788446450474,"version":"build-2803163510"},"reference-count":37,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2013,6,6]],"date-time":"2013-06-06T00:00:00Z","timestamp":1370476800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"NIH\/NIA","award":["K02 AG023582"],"award-info":[{"award-number":["K02 AG023582"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Muscle and Nerve"],"published-print":{"date-parts":[[2014,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    <jats:italic>Introduction<\/jats:italic>\n                    : Whereas deficits in muscle function, particularly power production, develop in old age and are risk factors for mobility impairment, a complete understanding of muscle fatigue during dynamic contractions is lacking. We tested hypotheses related to torque\u2010producing capacity, fatigue resistance, and variability of torque production during repeated maximal contractions in healthy older, mobility\u2010impaired older, and young women.\n                    <jats:italic>Methods<\/jats:italic>\n                    : Knee extensor fatigue (decline in torque) was measured during 4 min of dynamic contractions. Torque variability was characterized using a novel 4\u2010component logistic regression model.\n                    <jats:italic>Results<\/jats:italic>\n                    : Young women produced more torque at baseline and during the protocol than older women (\n                    <jats:italic>P<\/jats:italic>\n                    \u2009&lt;\u20090.001). Although fatigue did not differ between groups (\n                    <jats:italic>P<\/jats:italic>\n                    \u2009=\u20090.53), torque variability differed by group (\n                    <jats:italic>P<\/jats:italic>\n                    \u2009=\u20090.022) and was greater in older impaired compared with young women (\n                    <jats:italic>P<\/jats:italic>\n                    \u2009=\u20090.010).\n                    <jats:italic>Conclusions<\/jats:italic>\n                    : These results suggest that increased torque variability may combine with baseline muscle weakness to limit function, particularly in older adults with mobility impairments.\n                    <jats:italic>Muscle Nerve<\/jats:italic>\n                    <jats:bold>49<\/jats:bold>\n                    : 209\u2013217, 2014\n                  <\/jats:p>","DOI":"10.1002\/mus.23903","type":"journal-article","created":{"date-parts":[[2013,5,14]],"date-time":"2013-05-14T11:23:25Z","timestamp":1368530605000},"page":"209-217","source":"Crossref","is-referenced-by-count":38,"title":["Muscle weakness, fatigue, and torque variability: Effects of age and mobility status"],"prefix":"10.1002","volume":"49","author":[{"given":"Jane A.","family":"Kent\u2010Braun","sequence":"first","affiliation":[{"name":"Department of Kinesiology University of Massachusetts 108 Totman Building, 30 Eastman Lane Amherst Massachusetts 01003 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Damien M.","family":"Callahan","sequence":"additional","affiliation":[{"name":"Department of Kinesiology University of Massachusetts 108 Totman Building, 30 Eastman Lane Amherst Massachusetts 01003 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jessica L.","family":"Fay","sequence":"additional","affiliation":[{"name":"Department 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