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The purpose of this study was to characterise the cardiac cycle timing intervals and contractility parameters in university\u2010level varsity athletes. 152\u00a0males and 93 females were assessed using a non\u2010invasive seismocardiography cardiac sensor attached to the sternum for 1\u2010minute. Shorter isovolumic relaxation time (IVRT), systolic time, mitral valve open to E\u2010wave (MVO to E) time, rapid ejection period (REP), atrial systole to mitral valve closure (AS to MVC) time, and diastolic performance index (IVRT\/systolic time) were found in females, while heart rate was lower in males. Varying differences in timing intervals were found between sports. Systolic times were longer in male and female basketball players, while diastole was shortest in male football players, who also had higher heart rates than the other male sport athletes. These results add reference cardiac cycle timing data to the literature and imply that male and female athletes show different cardiac characteristics. Team differences suggest that different training for different sports can result in unique cardiac function changes, however, these appear to be related to the sex of the participants. The addition of these cardiac cycle timing intervals adds a valuable comparative tool to better understand cardiac physiology in the varsity athletic population.<\/jats:p>","DOI":"10.1080\/17461391.2023.2178329","type":"journal-article","created":{"date-parts":[[2023,2,8]],"date-time":"2023-02-08T09:46:18Z","timestamp":1675849578000},"page":"1457-1462","update-policy":"https:\/\/doi.org\/10.1080\/tandf_crossmark_01","source":"Crossref","is-referenced-by-count":9,"title":["Cardiac cycle timing intervals in university varsity athletes"],"prefix":"10.1002","volume":"23","author":[{"given":"Jyotpal","family":"Singh","sequence":"first","affiliation":[{"name":"Faculty of Kinesiology and Health Studies University of Regina Regina Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chase J.","family":"Ellingson","sequence":"additional","affiliation":[{"name":"Faculty of Kinesiology and Health Studies University of Regina Regina Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cody A.","family":"Ellingson","sequence":"additional","affiliation":[{"name":"Faculty of Kinesiology and Health Studies University of Regina Regina Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Parker","family":"Scott","sequence":"additional","affiliation":[{"name":"College of Kinesiology University of Saskatchewan Saskatoon Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. Patrick","family":"Neary","sequence":"additional","affiliation":[{"name":"Faculty of Kinesiology and Health Studies University of Regina Regina Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,2,23]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejhf.2022"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1161\/CIRCULATIONAHA.110.981571"},{"key":"e_1_2_8_4_1","doi-asserted-by":"crossref","unstructured":"Bakogiannis C. Mouselimis D. Tsarouchas A. Papatheodorou E. Vassilikos V. P. &Androulakis E.(2021). Hypertrophic cardiomyopathy or athlete's heart? 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