Meeting international aerobic physical activity guidelines is associated with enhanced cardiovagal baroreflex sensitivity in healthy older adults

O’Brien, Myles W.; Johns, Jarrett A.; Dorey, Tristan W.; Frayne, Ryan J.; Fowles, Jonathon R.; Mekary, Saïd; Kimmerly, Derek S.

doi:10.1007/s10286-019-00641-9

Cited by 8 publications

(3 citation statements)

References 34 publications

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“…Finally, the present study was designed as a cross-sectional study that compared resistance-trained men and untrained men. Although habitual physical and untrained activity patterns also influence cardiovagal BRS [ 56 , 57 ], these were not measured nor controlled in the present study. Therefore, this study’s findings should be confirmed with an intervention study.…”

Section: Discussionmentioning

confidence: 99%

Effects of Greater Central Arterial Stiffness on Cardiovagal Baroreflex Sensitivity in Resistance-Trained Men

Nakamura

Muraoka

2021

Sports Med - Open

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Background Compared with age-matched untrained men, resistance-trained men who have undergone long duration training (> 2 years) at a high frequency (> 5 days/week) may be lower cardiovagal baroreflex sensitivity (BRS) because of central arterial stiffening. Therefore, the purpose of this study was to examine the effect of greater central arterial stiffness in resistance-trained men on cardiovagal BRS in a cross-sectional study to compare resistance-trained men with age-matched untrained men. Methods This cross-sectional study included resistance-trained men (n = 20; age: 22 ± 3; body mass index: 26.7 ± 2.2) and age-matched untrained men (control group: n = 20; age: 25 ± 2; body mass index: 23.7 ± 2.4). The β-stiffness index and arterial compliance were assessed at the right carotid artery using a combination of a brightness mode ultrasonography system for the carotid artery diameter and applanation tonometry for the carotid blood pressure. And, the cardiovagal BRS was estimated by the slope of the R–R interval and systolic blood pressure during Phase II and IV of Valsalva maneuver (VM). The participants maintained an expiratory mouth pressure of 40 mmHg for 15 s in the supine position. Results The β-Stiffness index was significantly higher in the resistance-trained group than in the control group (5.9 ± 1.4 vs. 4.4 ± 1.0 a.u., P < 0.01). In contrast, the resistance-trained group had significantly lower arterial compliance (0.15 ± 0.05 vs. 0.20 ± 0.04 mm2/mmHg, P < 0.01) and cardiovagal BRS during Phase IV of VM (9.0 ± 2.5 vs. 12.9 ± 5.4 ms/mmHg, P < 0.01) than the control group and. Moreover, cardiovagal BRS during Phase IV of VM was inversely and positively correlated with the β-stiffness index (r = − 0.59, P < 0.01) and arterial compliance (r = 0.64, P < 0.01), respectively. Conclusion Resistance-trained group had greater central arterial stiffness and lower cardiovagal BRS Phase IV compared with control group. Moreover, the central arterial stiffening was related to cardiovagal BRS Phase IV. These results suggest that greater central arterial stiffness in resistance-trained men may be associated with lower cardiovagal BRS. Trial Registration University hospital Medical Information Network (UMIN) in Japan, UMIN000038116. Registered on September 27, 2019.

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Section: Discussionmentioning

confidence: 99%

Effects of Greater Central Arterial Stiffness on Cardiovagal Baroreflex Sensitivity in Resistance-Trained Men

Nakamura

Muraoka

2021

Sports Med - Open

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“…The minimum beat-by-beat changes required were at least 1 mmHg for SBP and at least 1.0 ms for RR interval. 30,31 Simple linear regression was used to relate SBP to RR-interval for each sequence and only sequences with an r≥0.85 were included in analysis. 30,31 For each participant, the average slope for pooled sequences was taken as the individual's cvBRS index.…”

Section: Spontaneous Cardiovagal Barore Ex Sensitivitymentioning

confidence: 99%

Effects of exercise on autonomic cardiovascular control in individuals with chronic, motor-complete spinal cord injury: an exploratory randomised clinical trial

Dorey¹,

Nightingale

Alrashidi³

et al. 2023

Preprint

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Study Design: Secondary analysis of a clinical trial. Objective: To assess the impact of 6 months of arm-cycle ergometer training (ACET), or body weight supported treadmill training (BWSTT), on autonomic cardiovascular responses to a laboratory sit-up test (SUT) in individuals with chronic (≥1-year post-injury) spinal cord injury (SCI). Setting: Canada. Methods: Sixteen individuals with motor-complete (American Spinal Injury Association Impairment Scale A-B) SCI between the fourth cervical and sixth thoracic spinal cord segments, aged 39±11 years, were assessed. Participants were randomized to receive 72 sessions of moderate-to-vigorous intensity ACET (n=8) or passive BWSTT (n=8). Changes in mean arterial pressure (MAP; finger plethysmography), hemodynamics (Modelflow® method), and heart rate/heart rate variability (HR/HRV; electrocardiography) were measured in response to SUT before and after 6 months of exercise training. Spontaneous cardiovagal baroreflex sensitivity (cvBRS) was assessed using the sequence method. Results: Neither ACET nor BWSTT impacted hemodynamic responses to SUT or the incidence of orthostatic hypotension (all P>0.36). ACET led to increased HR and high frequency (HF) power HRV responses (interaction effects, both P<0.01) to SUT following 6 months of training compared to BWSTT. Consistent with this, cvBRS improved (P<0.05) following ACET but not BWSTT. At the group level, improvements in cvBRS were highly correlated with both the HR (r=0.726, P<0.0001) and HF power (R=-0.484, P<0.01) responses to SUT. Conclusion: Six months of exercise training had no effect on BP responses to SUT in individuals with SCI. However, ACET, but not BWSTT, improved cardiovagal baroreflex control of HR in individuals with chronic, motor-complete SCI, suggesting benefits of volitional upper-body exercise. Clinical Trial Registration: NCT01718977

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“…Participation in physical activity can have a positive effect in terms of personal and social costs. Physical activity should be an essential treatment intervention for the older population with hypertension [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Exploring Perceived Barriers to Physical Activity in Korean Older Patients with Hypertension: Photovoice Inquiry

Lee

Kim

Ryu³

et al. 2022

IJERPH

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This study attempted to explore the barriers to physical activity of older patients with Hypertension. It aimed to provide robust evidence produced through their eyes. First, through the data analysis of the accelerometer and the decision of the research team, 10 out of the 30 applicants were invited to participate in a photovoice study. Photovoice is one example of participatory action research. Photovoice participants can communicate their unique experiences through photographs, providing a highly realistic and authentic perspective that is not possible to be understood with traditional qualitative research. This study inductively identified four main themes; health illiteracy, distortion of health information, fear of physical activity, and rejection of any life changes. Based on a specific understanding of the population’s perception of physical activity, this study attempted to provide evidence of why many elderly Korean patients with Hypertension stay inactive.

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Meeting international aerobic physical activity guidelines is associated with enhanced cardiovagal baroreflex sensitivity in healthy older adults

Cited by 8 publications

References 34 publications

Effects of Greater Central Arterial Stiffness on Cardiovagal Baroreflex Sensitivity in Resistance-Trained Men

Effects of Greater Central Arterial Stiffness on Cardiovagal Baroreflex Sensitivity in Resistance-Trained Men

Effects of exercise on autonomic cardiovascular control in individuals with chronic, motor-complete spinal cord injury: an exploratory randomised clinical trial

Exploring Perceived Barriers to Physical Activity in Korean Older Patients with Hypertension: Photovoice Inquiry

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