{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T20:37:12Z","timestamp":1785443832320,"version":"3.56.0"},"reference-count":11,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2013,11,7]],"date-time":"2013-11-07T00:00:00Z","timestamp":1383782400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2014,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To study effects of regular physical exercise in pregnancy on duration of the active phase of labor and the proportions of women with prolonged active second stage.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>A two\u2010armed, two\u2010center randomized controlled trial.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting<\/jats:title><jats:p>St. Olavs Hospital, Trondheim University Hospital and Stavanger University Hospital.<\/jats:p><\/jats:sec><jats:sec><jats:title>Population<\/jats:title><jats:p>A total of 855 women were randomized to intervention or control groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The intervention was a 12\u2010week exercise program, including aerobic and strengthening exercises, conducted between the 20th and 36th\u00a0week of gestation. One weekly group session was led by physiotherapists and home exercises were encouraged twice a week. Controls received standard antenatal care.<\/jats:p><\/jats:sec><jats:sec><jats:title>Main outcome measures<\/jats:title><jats:p>The duration of active phase of labor and number of prolonged second stage deliveries (active pushing &gt; 60\u00a0min). We also studied labor outcomes. Supplementary analyses were done in a subgroup of nulliparous women with a singleton cephalic fetus and spontaneous start of term delivery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Duration of labor was similar in the two groups, and there were no differences in labor outcomes. In a subgroup analysis the duration of active second stage labor was shorter in the control group (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.01).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Regular physical exercise during pregnancy did not influence duration of the active phase of labor or the proportion of women with prolonged active second stage.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aogs.12260","type":"journal-article","created":{"date-parts":[[2013,10,8]],"date-time":"2013-10-08T16:51:38Z","timestamp":1381251098000},"page":"73-79","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":40,"title":["Does regular exercise in pregnancy influence duration of labor? A secondary analysis of a randomized controlled trial"],"prefix":"10.1111","volume":"93","author":[{"given":"Kjell \u00c5.","family":"Salvesen","sequence":"first","affiliation":[{"name":"Clinical Sciences Obstetrics and Gynecology Lund University Lund Sweden"},{"name":"National Center for Fetal Medicine, Department of Obstetrics and Gynecology St. Olavs Hospital, Trondheim University Hospital Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Signe N.","family":"Stafne","sequence":"additional","affiliation":[{"name":"Clinical Services St. Olavs Hospital Trondheim University Hospital Trondheim Norway"},{"name":"Faculty of Medicine Department of Public Health and General Practice Norwegian University of Science and Technology Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Torbj\u00f8rn M.","family":"Eggeb\u00f8","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Stavanger University Hospital Stavanger Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Siv","family":"M\u00f8rkved","sequence":"additional","affiliation":[{"name":"Clinical Services St. Olavs Hospital Trondheim University Hospital Trondheim Norway"},{"name":"Faculty of Medicine Department of Public Health and General Practice Norwegian University of Science and Technology Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2013,11,7]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1097\/00003081-200306000-00028"},{"key":"e_1_2_9_3_1","unstructured":"UK Midwifery Archives. 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