Spontaneous cardiovagal baroreflex sensitivity is unaffected by an acute bout of prolonged sitting: no impact of sex, menstrual phase, or oral contraceptive pill phase

2021 ◽  
Author(s):  
Myles W. O’Brien ◽  
Amera Al-Hinnawi ◽  
Jarrett A. Johns ◽  
Derek S. Kimmerly
Keyword(s):  
Oral Contraceptive ◽  
Baroreflex Sensitivity ◽  
Oral Contraceptive Pill ◽  
Menstrual Phase ◽  
Acute Bout ◽  
Contraceptive Pill ◽  
Prolonged Sitting

Popliteal flow-mediated dilatory responses to an acute bout of prolonged sitting between earlier and later phases of natural menstrual and oral contraceptive pill cycles

2020 ◽  
Vol 129 (4) ◽  
pp. 637-645 ◽  
Author(s):  
Myles W. O’Brien ◽  
Jarrett A. Johns ◽  
Amera Al-Hinnawi ◽  
Derek S. Kimmerly
Keyword(s):  
Oral Contraceptive ◽  
Endothelial Function ◽  
Popliteal Artery ◽  
Oral Contraceptive Pill ◽  
Acute Bout ◽  
Acute Period ◽  
Contraceptive Pill ◽  
Young Females ◽  
Conduit Artery ◽  
Prolonged Sitting

We compared changes in popliteal artery endothelial function to a 3-h bout of sitting in females across their natural menstrual or oral contraceptive pill cycles. Pre-sitting endothelial-dependent vasodilation was greater in females who naturally menstruate during the later versus earlier phase but unchanged among contraceptive pill phases. Neither menstrual nor oral contraceptive pill phases attenuated the robust decline in conduit artery health following an acute period of uninterrupted sitting in young females.

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