{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T01:14:57Z","timestamp":1792458897061,"version":"4.5.0"},"reference-count":54,"publisher":"Public Library of Science (PLoS)","issue":"5","license":[{"start":{"date-parts":[[2022,5,25]],"date-time":"2022-05-25T00:00:00Z","timestamp":1653436800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"national institutes of health","doi-asserted-by":"publisher","award":["P30-EY014801"],"award-info":[{"award-number":["P30-EY014801"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100001818","name":"research to prevent blindness","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100001818","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012550","name":"nemzeti kutat\u00e1si, fejleszt\u00e9si \u00e9s innovaci\u00f3s alap","doi-asserted-by":"publisher","award":["2020-4.1.1-TKP2020"],"award-info":[{"award-number":["2020-4.1.1-TKP2020"]}],"id":[{"id":"10.13039\/501100012550","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012550","name":"nemzeti kutat\u00e1si, fejleszt\u00e9si \u00e9s innovaci\u00f3s alap","doi-asserted-by":"publisher","award":["TKP2020-NKA-17"],"award-info":[{"award-number":["TKP2020-NKA-17"]}],"id":[{"id":"10.13039\/501100012550","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec001\">\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>There is abundant evidence on the benefits of physical activity on cardiovascular health. However, there are only few data on the acute effects of physical exercise on the retina and choroid. Our aim was the in vivo examination of chorioretinal alterations following short intense physical activity by spectral domain optical coherence tomography (SD-OCT).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec002\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Twenty-one eyes of 21 healthy, young subjects (mean age 22.5 \u00b1 4.1 years, 15 males and 6 females) were recruited. Macular scanning with a SD-OCT was performed before and following a vita maxima-type physical strain exercise on a rowing ergometer until complete fatigue. Follow-up OCT scans were performed 1, 5, 15, 30 and 60 minutes following the exercise. The OCT images were exported and analyzed using our custom-built OCTRIMA 3D software and the thickness of 7 retinal layers was calculated, along with semi-automated measurement of the choroidal thickness. One-way ANOVA analysis was performed followed by Dunnett post hoc test for the thickness change compared to baseline and the correlation between performance and thickness change has also been calculated. The level of significance was set at 0.001.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec003\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      We observed a significant thinning of the total retina 1 minute post-exercise (-7.3 \u00b1 0.6 \u03bcm,\n                      <jats:italic>p<\/jats:italic>\n                      &lt; 0.001) which was followed by a significant thickening by 5 and 15 minutes (+3.6 \u00b1 0.6 \u03bcm and +4.0 \u00b1 0.6 \u03bcm, respectively, both\n                      <jats:italic>p<\/jats:italic>\n                      &lt;0.001). Post-exercise retinal thickness returned to baseline by 30 minutes. This trend was present throughout the most layers of the retina, with significant changes in the ganglion cell\u2013inner plexiform layer complex, (-1.3 \u00b1 0.1 \u03bcm, +0.6 \u00b1 0.1 \u03bcm and +0.7 \u00b1 0.1 \u03bcm, respectively,\n                      <jats:italic>p<\/jats:italic>\n                      &lt;0.001 for all), in the inner nuclear layer at 1 and 5 minutes (-0.8 \u00b1 0.1 \u03bcm and +0.8 \u00b1 0.1 \u03bcm, respectively,\n                      <jats:italic>p<\/jats:italic>\n                      &lt;0.001 for both), in the outer nuclear layer\u2013photoreceptor inner segment complex at 5 minute (+2.3 \u00b1 0.4 \u03bcm,\n                      <jats:italic>p<\/jats:italic>\n                      &lt;0.001 for all) and in the interdigitation zone\u2013retinal pigment epithelium complex at 1 and 15 minutes (-3.3 \u00b1 0.4 \u03bcm and +1.8 \u00b1 0.4 \u03bcm, respectively,\n                      <jats:italic>p<\/jats:italic>\n                      &lt;0.001 for both). There was no significant change in choroidal thickness; however, we could detect a tendency towards thinning at 1, 15, and 30 minutes following exercise. The observed changes in thickness change did not correlate with performance. Similar trends were observed in both professional and amateur sportsmen (n = 15 and n = 6, respectively). The absolute changes in choroidal thickness did not show any correlation with the thickness changes of the intraretinal layers.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec004\">\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Our study implies that in young adults, intense physical exercise has an acute effect on the granular layers of the retina, resulting in thinning followed by rebound thickening before normalization. We could not identify any clear correlation with either choroidal changes or performance that might explain our observations, and hence the exact mechanism warrants further clarification. We believe that a combination of vascular and mechanic changes is behind the observed trends.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1371\/journal.pone.0268770","type":"journal-article","created":{"date-parts":[[2022,5,25]],"date-time":"2022-05-25T13:37:55Z","timestamp":1653485875000},"page":"e0268770","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":6,"title":["The assessment of acute chorioretinal changes due to intensive physical exercise in young 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