Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 8 of 8
Full-Text Articles in Education
Can We Calculate Mean Arterial Pressure In Humans?, Matthew M. Howrey, Tiffany L. Brazile, Bryce N. Balmain, Andrew R. Tomlinson, James P. Macnamara, Tony G. Babb, Benjamin D. Levine, Satyam Sarma, Christopher M. Hearon Jr, Denis J. Wakeham
Can We Calculate Mean Arterial Pressure In Humans?, Matthew M. Howrey, Tiffany L. Brazile, Bryce N. Balmain, Andrew R. Tomlinson, James P. Macnamara, Tony G. Babb, Benjamin D. Levine, Satyam Sarma, Christopher M. Hearon Jr, Denis J. Wakeham
International Journal of Exercise Science: Conference Proceedings
Mean arterial pressure (MAP) is either measured with an oscillometric cuff and then systolic (SBP) and diastolic (DBP) blood pressures are estimated from an unknown algorithm; or SBP and DBP are measured via auscultation and MAP calculated using measures of systolic pressure (SBP), diastolic pressure (DBP), and a form-factor (FF; equation: [(SBP-DBP)*FF]+DBP). The typical FF used is 0.33 though others (0.4) have been proposed. Recent work indicates that estimation of aortic MAP via a FF leads to inaccurate values and should therefore be interpreted with caution, whether this is the case for local MAP is unknown. While the implications for …
Common Carotid Artery Hemodynamic And Stiffness Responses To Acute And Repeated Bouts Of High Intensity Cardiorespiratory And Resistance Exercise, Zaria S. Opara, Michael Diaz, Lavleen Sandhu, Gabriel Hernandez, Octavia Gosnel, Louise Kelly Ph.D, Jie Liu Md, Ph.D, Allan Knox Ph.D
Common Carotid Artery Hemodynamic And Stiffness Responses To Acute And Repeated Bouts Of High Intensity Cardiorespiratory And Resistance Exercise, Zaria S. Opara, Michael Diaz, Lavleen Sandhu, Gabriel Hernandez, Octavia Gosnel, Louise Kelly Ph.D, Jie Liu Md, Ph.D, Allan Knox Ph.D
International Journal of Exercise Science: Conference Proceedings
High intensity exercise is a popular mode of physical activity amongst professional and recreational athletes. The physiological stress induced by intense cardiorespiratory and muscular strengthening exercise has clinically relevant cardiovascular benefits. However, the immediate cerebrovascular response to acute and repeated bouts of intense exercise has yet to be determined. PURPOSE: To observe the hemodynamic and stiffness indexes of the common carotid artery (CCA) in response to acute and repeated bouts of cardiorespiratory and resistance exercise. METHODS: Participants (n=28) performed a maximal oxygen consumption test (VO2max), leg strength test (1RM), a sprint interval session (SIS, all out …
Peripheral And Cerebral Arterial Hemodynamic And Mechanical Responses To A Maximal Oxygen Consumption Exercise Test In Males And Females, Octavia Gosnell, Zaria Opara, Michael Diaz, Lavleen Sandhu, Gabriel Hernandez, Louise Kelly, Jie Liu, Allan Knox
Peripheral And Cerebral Arterial Hemodynamic And Mechanical Responses To A Maximal Oxygen Consumption Exercise Test In Males And Females, Octavia Gosnell, Zaria Opara, Michael Diaz, Lavleen Sandhu, Gabriel Hernandez, Louise Kelly, Jie Liu, Allan Knox
International Journal of Exercise Science: Conference Proceedings
Variations in physiological responses to exercise between males and females have been identified by previous investigations. Maximal oxygen consumption tests (VO2max) are widely used for exercise prescription within the professional and recreational capacity, in addition to providing insight of overall cardiovascular and pulmonary health. However, the specific response of multiple components of the arterial network have yet to be established and compared within males and females. PURPOSE: To determine the hemodynamic and mechanical responses of the brachial artery (BA), the common carotid artery (CCA), and the internal carotid artery (ICA) to VO2max. METHODS: College-aged …
No Sex Differences In Common Carotid Artery Stiffness Response Following Maximal Oxygen Consumption Test, Heysel Y. Morales, Michael Diaz, Zaria Opara, Allan Knox
No Sex Differences In Common Carotid Artery Stiffness Response Following Maximal Oxygen Consumption Test, Heysel Y. Morales, Michael Diaz, Zaria Opara, Allan Knox
International Journal of Exercise Science: Conference Proceedings
PURPOSE: Previous investigations have reported sex differences in the time course of age-related arterial stiffness, with postmenopausal women presenting increased risk of cardiovascular diseases. Using sex as a biological variable has identified differences between males and females in physiological responses to equivalent doses of exercise. The purpose of this study was to determine if sex differences exist in arterial stiffness response to a maximum oxygen consumption (VO2max) exercise test. METHODS: VO2max was measured by indirect calorimetry. Body composition was measured by air displacement plethysmography (BODPOD). Indices of common carotid artery (CCA) stiffness (Peterson’s elastic modulus [Ep], Beta stiffness [B1], …
Maximum Aerobic Exercise Induces Common Carotid Vasoconstriction And Increased Vascular Resistance, Michael Diaz, Zaria Opara, Heysel Morales, Allan Knox
Maximum Aerobic Exercise Induces Common Carotid Vasoconstriction And Increased Vascular Resistance, Michael Diaz, Zaria Opara, Heysel Morales, Allan Knox
International Journal of Exercise Science: Conference Proceedings
PURPOSE: Low-to-moderate intensity aerobic exercise has been reported to elicit changes in systemic hemodynamics. Recent evidence suggests that the cerebral circulation reacts independently to systemic circulations to the same physiological stimuli. The aim of this is to determine the influence of high-intensity aerobic exercise on common carotid artery (CCA) hemodynamics. METHODS: Hemodynamic measurements were recorded before and following the cessation of a maximum oxygen uptake test (VO2max). One minute video of the CCA by Doppler ultrasound were recorded and used to determine peak systolic velocity (PSV), end diastolic velocity (EDV), time averaged mean blood velocity (TAMEAN), timed …
The Effects Of Different Intensities Of Resistance Training On Hemodynamics, Edna Giselle Valadez Ortiz, Darian Gonzalez, Lynda Rosas, Akaela Rae Vidaña, Elisa Orozco
The Effects Of Different Intensities Of Resistance Training On Hemodynamics, Edna Giselle Valadez Ortiz, Darian Gonzalez, Lynda Rosas, Akaela Rae Vidaña, Elisa Orozco
International Journal of Exercise Science: Conference Proceedings
PURPOSE: The purpose of this study was to analyze the effects of different resistance training intensities on blood pressure (BP) and heart rate (HR) responses. METHODS: 12 males and 12 females (19-28 age) participated in the study (5 sessions). On the first day, initial screening, anthropometric measures, cycle ergometer seat height, leg extension/leg curl machine setting, and familiarization with testing procedures were completed. On the second day, one-repetition maximum (1RM) testing was completed in 2 trials for each machine, starting with 10 min warm up on the cycle ergometer. Following general warm up, subjects performed specific warm up at 50% …
Exercise Cerebral Blood Flow Hemodynamics Differ In Hot Dry And Humid Conditions, Julianna J. Kilpatrick, Paolo Miguel Salvador, Kyleigh Allie, Eric Rivas
Exercise Cerebral Blood Flow Hemodynamics Differ In Hot Dry And Humid Conditions, Julianna J. Kilpatrick, Paolo Miguel Salvador, Kyleigh Allie, Eric Rivas
International Journal of Exercise Science: Conference Proceedings
Passive and exercise-heat stress have been reported to cause reductions in cerebral blood flow (CBF); however, it is unknown if CBF velocity is different under hot dry and humid conditions. PURPOSE: This project tested the hypothesis that upright rest and exercise-heat stress in hot dry and humid conditions result in similar CBF reductions. METHODS: Seven healthy active (7 day activity: 9887±3564 steps/day; VO2max: 52±10 mL/kg/min) subjects (5M/2F, 24±9y, 171±6cm, 68±7kg) completed a 30 min baseline rest followed by 60 min of exercise at a rate of perceived exertion (RPE) of 12 (between light and somewhat hard) on a …
Walking With Leg Blood Flow Restriction: Wide-Rigid Cuffs Vs. Narrow-Elastic Bands, Sten Stray-Gundersen, Savannah V. Wooten, Hirofumi Tanaka
Walking With Leg Blood Flow Restriction: Wide-Rigid Cuffs Vs. Narrow-Elastic Bands, Sten Stray-Gundersen, Savannah V. Wooten, Hirofumi Tanaka
International Journal of Exercise Science: Conference Proceedings
Blood flow restriction (BFR) training has become a popular form of exercise in recent years. The concept is that light-load exercise with BFR elicits similar adaptations achieved with heavy-load exercise. Walking exercise in combination with pressurized wide-rigid (WR) cuffs has been shown to elicit higher cardiac workload and a vascular dysfunction due presumably to reperfusion injury to the endothelium. In contrast, narrow-elastic (NE) BFR bands may elicit different hemodynamic effects, as the limb is able to increase in diameter with increased blood flow accompanying exercise. PURPOSE: To compare two distinct forms of BFR bands during light-intensity exercise on cardiovascular …