Influence of sex,menstrual cycle,and oral contraceptives on the cerebrovascular response to paced deep breathing期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Influence of sex,menstrual cycle,and oral contraceptives on the cerebrovascular response to paced deep breathing

Authors:	Misha Nili Syed Abidi Stephania Serna Simon Kim Heather Edgell

Institution:	1.School of Kinesiology and Health Sciences,York University,Toronto,Canada;2.Muscle Health Research Centre, York University,Toronto,Canada

Abstract:	Purpose Deep breathing assesses autonomic function; however, many researchers/clinicians do not account for hyperventilation, brain blood flow or blood pressure. Methods Men and women (with/without oral contraceptives) participated. women participated during low and high hormone phases of the menstrual cycle. Blood pressure, end-tidal carbon dioxide, middle cerebral artery velocity and cerebrovascular resistance were assessed. Results Deep breathing decreased end-tidal carbon dioxide and middle cerebral artery velocity while increasing cerebrovascular resistance in all participants; blood pressure decreased in men. There were no influences of menstrual cycle or oral contraceptives. Conclusions Men have different autonomic responses to deep breathing compared to women.

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