{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T12:06:54Z","timestamp":1791893214618,"version":"4.3.4"},"reference-count":23,"publisher":"BMJ","issue":"3","funder":[{"DOI":"10.13039\/501100000024","name":"CIHR","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100000024","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100000190","name":"University of Alberta","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000190","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004489","name":"Mitacs","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004489","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000038","name":"NSERC","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100000038","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Christenson Professorship in Active Healthy Living"}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Br J Sports Med"],"accepted":{"date-parts":[[2024,11,21]]},"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To examine maternal and fetal cardiovascular responses to high-intensity resistance exercise in pregnancy.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>10 healthy pregnant (26.4\u00b13.2 weeks gestation) and 10 healthy non-pregnant individuals were recruited (34.8\u00b16\u2009and 33.5\u00b12.9 years, respectively). At least 48 hours after baseline strength testing to determine 10-repetition maximum (10 RM), participants completed 10 repetitions of barbell back squat, bench press and deadlift at 70%, 80% and 90% of 10 RM with free breathing, followed by 10 repetitions at 90% 10 RM with a Valsalva manoeuvre. Maternal heart rate was monitored continuously. Fetal heart rate, umbilical systolic\/diastolic (S\/D) ratio, resistive index (RI) and pulsatility index (PI), as well as maternal blood pressure, glucose and lactate were assessed immediately before and after exercise.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The amount of weight lifted and the rate of perceived exertion by pregnant and non-pregnant participants were similar throughout each exercise. Maternal heart rate increased with the amount of weight lifted, peaking with the use of the Valsalva manoeuvre (squat: 137.3\u00b18.4\u2009bpm; bench press: 110.5\u00b110.4\u2009bpm; deadlift: 130.7\u00b19.0\u2009bpm). Fetal bradycardia was not observed, and fetal heart rate did not change from pre-to-post exercise (squat: p=0.639; bench press: p=0.682; deadlift: p=0.847). Umbilical blood flow metrics, such as RI, remained within normal ranges throughout each set of squats (p=0.642), bench press (p=0.287) and deadlifts (p=0.614).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Our findings suggest that high-intensity resistance exercises are well tolerated by both mother and fetus, including while using the Valsalva manoeuvre.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1136\/bjsports-2024-108804","type":"journal-article","created":{"date-parts":[[2024,12,18]],"date-time":"2024-12-18T09:49:09Z","timestamp":1734515349000},"page":"159-166","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":17,"title":["Maternal and fetal responses to acute high-intensity resistance exercise during pregnancy"],"prefix":"10.1136","volume":"59","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-2142-5093","authenticated-orcid":false,"given":"Amy N","family":"Moolyk","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Megan K","family":"Wilson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brittany A","family":"Matenchuk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-3987-3484","authenticated-orcid":false,"given":"Gyanjot","family":"Bains","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-2412-7403","authenticated-orcid":false,"given":"Matthew J","family":"Gervais","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jenna B","family":"Wowdzia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5627-5773","authenticated-orcid":false,"given":"Margie H","family":"Davenport","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2024,12,18]]},"reference":[{"key":"2025020309100705000_59.3.159.1","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pone.0238369","article-title":"Sex differences and impact of body mass on performance from childhood to senior athletes in Olympic weightlifting","volume":"15","author":"Huebner","year":"2020","journal-title":"PLoS ONE"},{"key":"2025020309100705000_59.3.159.2","first-page":"20","volume-title":"Strength in Numbers Women in Olympic-Style Weightlifting","volume":"18","author":"Huebner","year":"2021"},{"key":"2025020309100705000_59.3.159.3","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2018-100056"},{"key":"2025020309100705000_59.3.159.4","unstructured":"Brown WJ , Hayman M , Haakstad LAH , et al . 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