{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,5]],"date-time":"2026-11-05T07:08:27Z","timestamp":1793862507540,"version":"4.6.1"},"reference-count":53,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2021,6,10]],"date-time":"2021-06-10T00:00:00Z","timestamp":1623283200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Fibromyalgia (FM) is a chronic pain condition associated with impaired muscle strength and exercise-induced pain. Physical exercise has been highlighted, by international clinical guidelines and stakeholders, as an essential component of rehabilitation in FM. Exposure to pain during exercise is generally correlated with elevated lactate levels and, additionally, is one known reason for persons with FM to avoid physical exercise and activity. A crossover design was used to test and evaluate an approach consisting of resistance exercise with heavy loads and a low number of repetitions among ten women with FM. The participants were consecutively recruited to test and perform exercise with two different resistance levels (A = light\/moderate load, and B = heavy load) in a randomized crossover trial using an AB\/BA setting. Results showed that the heavy load exercise session was experienced as more positive than the light\/moderate load exercise session and that lower lactate levels followed exercise with heavier weight loads. This is promising and indicates that the approach of heavy weight loads and accustomed repetitions is accepted in FM and has the potential to attenuate hesitation to exercise due to exercise-induced pain. However, these effects need to be further investigated in more extensive studies.<\/jats:p>","DOI":"10.3390\/ijerph18126276","type":"journal-article","created":{"date-parts":[[2021,6,10]],"date-time":"2021-06-10T13:31:39Z","timestamp":1623331899000},"page":"6276","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Women with Fibromyalgia Prefer Resistance Exercise with Heavy Loads\u2014A Randomized Crossover Pilot Study"],"prefix":"10.3390","volume":"18","author":[{"given":"Ulf Mathias","family":"Andersson","sequence":"first","affiliation":[{"name":"School of Health and Welfare, Medical Science, Dalarna University, 791 88 Falun, Sweden"},{"name":"Sm\u00e4rtmottagningen Falun, Dalarna Region, 791 31 Falun, Sweden"},{"name":"Sm\u00e4rtehabilitering S\u00e4ter, Dalarna Region, 783 32 S\u00e4ter, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8196-0553","authenticated-orcid":false,"given":"Anna Cristina","family":"\u00c5berg","sequence":"additional","affiliation":[{"name":"School of Health and Welfare, Medical Science, Dalarna University, 791 88 Falun, Sweden"},{"name":"Department of Public Health and Caring Sciences, Uppsala University, 751 85 Uppsala, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8560-3016","authenticated-orcid":false,"given":"Lena","family":"von Koch","sequence":"additional","affiliation":[{"name":"Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 76 Stockholm, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annie","family":"Palstam","sequence":"additional","affiliation":[{"name":"School of Health and Welfare, Medical Science, Dalarna University, 791 88 Falun, Sweden"},{"name":"Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, 413 45 Gothenburg, Sweden"},{"name":"Department of Rehabilitation Medicine, Sahlgrenska University Hospital, 413 45 Gothenburg, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,6,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"160","DOI":"10.1002\/art.1780330203","article-title":"The American College of Rheumatology 1990 Criteria for the Classification of Fibromyalgia. 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