{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T01:17:07Z","timestamp":1787015827311,"version":"build-2736575974"},"reference-count":88,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2023,5,9]],"date-time":"2023-05-09T00:00:00Z","timestamp":1683590400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pain Practice"],"published-print":{"date-parts":[[2023,9]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Exercise for people with whiplash associated disorder (WAD) induces hypoalgesic effects in some, but hyperalgesic effects in others. We investigated the exercise\u2010induced neurobiological effects of aerobic and strengthening exercise in individuals with chronic WAD.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Sixteen participants (8 WAD, 8 pain\u2010free [CON]) were randomised to either aerobic or strengthening exercise. MRI for brain morphometry, functional MRI for brain connectivity, and magnetic resonance spectroscopy for brain biochemistry, were used at baseline and after the 8\u2010week intervention.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      There were no differences in brain changes between exercise groups in either the WAD or CON group, therefore aerobic and strengthening data were combined to optimise sample size. After the exercise intervention, the CON group demonstrated increased cortical thickness (left parahippocampus: mean difference\u2009=\u20090.04, 95% CI\u2009=\u20090.07\u20130.00,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.032; and left lateral orbital frontal cortex: mean difference\u2009=\u20090.03, 95% CI\u2009=\u20090.00\u20130.06,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.048). The WAD group demonstrated an increase in prefrontal cortex (right medial orbital frontal) volume (mean difference\u2009=\u200995.57, 95% CI\u2009=\u20092.30\u2013192.84,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.046). Functional changes from baseline to follow\u2010up between the default mode network and the insula, cingulate cortex, temporal lobe, and somatosensory and motor cortices, were found in the CON group, but not in the WAD group. There were no changes post\u2010exercise in brain biochemistry.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Aerobic and strengthening exercises did not exert differential effects on brain characteristics, however differences in structural and functional changes were found between WAD and CON groups. This suggests that an altered central pain modulatory response may be responsible for differential effects of exercise in individuals with chronic WAD.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/papr.13240","type":"journal-article","created":{"date-parts":[[2023,5,9]],"date-time":"2023-05-09T03:11:59Z","timestamp":1683601919000},"page":"759-775","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The effects of physical exercise on structural, functional, and biochemical brain characteristics in individuals with chronic whiplash\u2010associated disorder: A pilot randomized clinical trial"],"prefix":"10.1111","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0273-3377","authenticated-orcid":false,"given":"Rutger M. 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