Search Results - "O'Brien, Myles W."

Is "not different" enough to conclude similar cardiovascular responses across sexes? by O'Brien, Myles W, Kimmerly, Derek S

“…The number of research studies investigating whether similar or different cardiovascular responses or adaptations exist between males and females is…”
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Impact of High-Intensity Interval Training, Moderate-Intensity Continuous Training, and Resistance Training on Endothelial Function in Older Adults by O’BRIEN, MYLES W., JOHNS, JARRETT A., ROBINSON, SUSAN A., BUNGAY, AMANDA, MEKARY, SAID, KIMMERLY, DEREK S.

“…PURPOSEIt is unclear if high-intensity interval training (HIIT) elicits superior improvements in brachial artery (BA) flow-mediated dilation (FMD) responses…”
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Improving the criterion validity of the activPAL in determining physical activity intensity during laboratory and free-living conditions by Wu, Yanlin, Johns, Jarrett A., Poitras, Justine, Kimmerly, Derek S., O'Brien, Myles W.

“…The activPAL is a valid measure of step counts and posture, but its ability to determine physical activity intensity is unclear. This study tested the…”
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Sex does not influence impairments in popliteal endothelial-dependent vasodilator or vasoconstrictor responses following prolonged sitting by O'Brien, Myles W, Johns, Jarrett A, Williams, Tanner D, Kimmerly, Derek S

“…An acute bout of prolonged sitting (PS) impairs the popliteal artery flow-mediated dilation (FMD) response. Despite equivocal reductions in mean shear rate,…”
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Are supine assessments an ecologically valid method to characterize sitting-induced declines in lower-limb vascular health? by Liu, Haoxuan, O'Brien, Myles W, Rayner, Sophie, Kimmerly, Derek S

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Validity of the ActivPAL monitor to distinguish postures: A systematic review by O’Brien, Myles W., Wu, Yanlin, Petterson, Jennifer L., Bray, Nick W., Kimmerly, Derek S.

“…Posture has been recently integrated into activity guidelines, advising people to limit their sedentary time and break up sedentary postures with…”
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Validity of the activPAL monitor to measure stepping activity and activity intensity: A systematic review by Wu, Yanlin, Petterson, Jennifer L., Bray, Nick W., Kimmerly, Derek S., O’Brien, Myles W.

“…Accumulating step counts and engaging in moderate-to-vigorous intensity physical activity is positively associated with numerous health benefits. The activPAL…”
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Association between changes in habitual stepping activity and cognition in older adults by O’Brien, Myles W., Bray, Nick W., Quirion, Isadora, Ahmadi, Shirko, Faivre, Pierre, Gallant, Francois, Gagnon, Caroline, Sénéchal, Martin, Dupuy, Olivier, Bélanger, Mathieu, Mekari, Said

“…Advancing age is associated with declines in cognitive function. Although physical activity is thought to protect against this decline, it is unclear how a…”
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Aerobic fitness and sympathetic responses to spontaneous muscle sympathetic nerve activity in young males by O’Brien, Myles W., Ramsay, Diane, Johnston, William, Kimmerly, Derek S.

“…Purpose Lower aerobic fitness increases the risk of developing hypertension. Muscle sympathetic nerve activity (MSNA) is important for the beat-by-beat…”
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The influence of habitual breaks in sedentary time on cardiovagal baroreflex function by O'Brien, Myles W, Al-Hinnawi, Amera, Wu, Yanlin, Petterson, Jennifer L, Shivgulam, Madeline E, Johns, Jarrett A, Frayne, Ryan J, Kimmerly, Derek S

“…Sedentary time has recently been included in the 24-h activity guidelines. However, the impact of habitual sedentary patterns on autonomic cardiovascular…”
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An open-source program to analyze spontaneous sympathetic neurohemodynamic transduction by O'Brien, Myles W, Petterson, Jennifer L, Kimmerly, Derek S

“…The sympathetic nervous system is important for the beat-by-beat regulation of arterial blood pressure and the control of blood flow to various organs…”
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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 by O'Brien, Myles W, Johns, Jarrett A, Al-Hinnawi, Amera, Kimmerly, Derek S

“…Uninterrupted sitting can impair popliteal flow-mediated dilation (FMD) responses in young, premenopausal females when endogenous or exogenous estrogen levels…”
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Sitting knee-flexion angle does not influence endothelial-dependent vasodilation in laboratory or free-living conditions by Shivgulam, Madeline E, O’Brien, Myles W, Wu, Yanlin, Liu, Haoxuan, Petterson, Jennifer L, Schwartz, Beverly D, Kimmerly, Derek S

“…Introduction: Single bouts of prolonged bent-legged sitting attenuate popliteal endothelial-dependent vasodilation (as assessed via flow-mediated dilation…”
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Does aerobic fitness impact prolonged sitting-induced popliteal artery endothelial dysfunction? by Liu, Haoxuan, O’Brien, Myles W., Johns, Jarrett A., Kimmerly, Derek S.

“…Purpose Acute prolonged bouts of sitting reduce popliteal artery blood flow and flow-mediated dilation (FMD). Individuals with higher aerobic fitness have…”
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Achieving Canadian physical activity guidelines is associated with better vascular function independent of aerobic fitness and sedentary time in older adults by O'Brien, Myles W, Robinson, Susan A, Frayne, Ryan, Mekary, Said, Fowles, Jonathon R, Kimmerly, Derek S

“…Canadian physical activity guidelines recommend older adults accumulate 150 min of weekly moderate to vigorous physical activity (MVPA). Older adults who are…”
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Health Care Providers’ Perspectives on Promoting Physical Activity and Exercise in Health Care by Pellerine, Liam P., O’Brien, Myles W., Shields, Chris A., Crowell, Sandra J., Strang, Robert, Fowles, Jonathon R.

“…Health care providers (HCPs) are entrusted with providing credible health-related information to their patients/clients. Patients/clients who receive physical…”
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An acute bout of prolonged sitting blunts popliteal endothelium-independent dilation in young, healthy adults by Liu, Haoxuan, O'Brien, Myles W, Wu, Yanlin, Bustamante, Carolina M, Kimmerly, Derek S

“…A single bout of prolonged uninterrupted sitting increases oxidative stress, reduces popliteal blood flow-induced shear stress, and diminishes…”
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Impact of habitual sedentary patterns on popliteal artery endothelial-dependent vasodilation in healthy adults by Shivgulam, Madeline E, O’Brien, Myles W, Johns, Jarrett A, Petterson, Jennifer L, Wu, Yanlin, Frayne, Ryan J, Kimmerly, Derek S

“…Introduction: Acute, laboratory-based bouts of prolonged sitting attenuate lower-limb arterial endothelial-dependent vasodilation. However, the impact of…”
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Assessing the criterion validity of the activPAL CREA v1.3 algorithm and ActiPASS 2023.12 software for detecting steps during a progressive treadmill-based laboratory protocol by Pellerine, Liam. P., Courish, Molly K., Petterson, Jennifer L., Shivgulam, Madeline E., Johansson, Peter J., Hettiarachchi, Pasan, Kimmerly, Derek S., O'Brien, Myles W.

“…Thigh-worn accelerometry is commonly implemented to measure step cadence. The default activPAL CREA algorithm is a valid measure of cadence during walking, but…”
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Faster stepping cadence partially explains the higher metabolic cost of walking among females versus males by Rayner, Sophie E, Pellerine, Liam P, Wu, Yanlin, Shivgulam, Madeline E, Petterson, Jennifer L, Kimmerly, Derek S, O'Brien, Myles W

“…The metabolic cost of walking (MCOW), or oxygen uptake normalized to distance, provides information on the energy expended during movement. There are…”
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