{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,2]],"date-time":"2025-10-02T23:35:45Z","timestamp":1759448145477,"version":"3.44.0"},"reference-count":25,"publisher":"BMJ","issue":"1","license":[{"start":{"date-parts":[[2020,6,8]],"date-time":"2020-06-08T00:00:00Z","timestamp":1591574400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Open Sport Exerc Med"],"accepted":{"date-parts":[[2020,7,26]]},"published-print":{"date-parts":[[2020,8]]},"abstract":"<jats:sec id=\"s1\">\n                  <jats:title>Objective<\/jats:title>\n                  <jats:p>To evaluate changes in pulmonary function and feasibility of portable continuous laryngoscopy during maximal uphill running.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec id=\"s2\">\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>Healthy volunteers participated in an uphill race. Forced expiratory volume in 1\u00a0s (FEV<jats:sub>1<\/jats:sub>) and forced vital capacity (FVC) were obtained before and 5 and 10\u00a0min after finishing the race. Capillary blood lactate concentration ([BLa<jats:sup>-<\/jats:sup>]) and Borg score for perceived exertion were registered immediately after the race. One participant wore a portable video-laryngoscope during the race, and the video was assessed for technical performance.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec id=\"s3\">\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>Twenty adult subjects participated with a mean (SD) age of 40.2 (9.7) years. Mean (SD) race duration and post-exercise [BLa<jats:sup>-<\/jats:sup>] was 13.9 (2.3) min and 10.7 (2.1) mmol\/L, respectively, and the median (range) Borg score for perceived exertion was 9 (5\u201310).\n<\/jats:p>\n                  <jats:p>Mean percentage change (95% CI) 5 and 10\u00a0min post-exercise in FEV<jats:sub>1<\/jats:sub> were 6.9 (3.7 to 10.2) % and 5.9 (2.7 to 9.0) %, respectively, and in FVC 5.2 (2.3 to 8.1) % and 4.7 (1.6 to 7.9) %, respectively. The recorded video of the larynx was of good quality.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec id=\"s4\">\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>Maximal aerobic field exercise induced bronchodilatation in the majority of the healthy non-asthmatic participants. It is feasible to perform continuous video-laryngoscopy during heavy uphill exercise.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/bmjsem-2020-000815","type":"journal-article","created":{"date-parts":[[2020,8,24]],"date-time":"2020-08-24T18:55:20Z","timestamp":1598295320000},"page":"e000815","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Changes in pulmonary function and feasibility of portable continuous laryngoscopy during maximal uphill running"],"prefix":"10.1136","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9740-3700","authenticated-orcid":false,"given":"Mette","family":"Engan","sequence":"first","affiliation":[{"name":"Department of Pediatric and Adolescent Medicine, Haukeland University Hospital, Bergen, Norway"},{"name":"Institute of Clinical Science, University of Bergen, Bergen, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ida 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