Carotid-cardiac baroreflex response and LBNP tolerance following resistance training

Tatro, D. L.; Dudley, Gary A.; Convertino, Victor A.

doi:10.1249/00005768-199207000-00009

Cited by 32 publications

(45 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a previous study, we reported significant decreases in baroreflex sensitivity using the same protocol as the present study [22], which is supported by other researchers [23]. While it is not known if baroreflex resetting occurs after acute resistance exercise, similar to aerobic exercise, it has been shown to occur after a period of resistance training [24], thereby reducing sympathetic outflow to the central nervous system. However, this is speculation, as we did not measure resetting of the baroreflex or sympathetic outflow in the present study.…”

Section: Discussionsupporting

confidence: 91%

Changes in Endothelial Function after Acute Resistance Exercise Using Free Weights

Tai

Marshall

Parks

et al. 2018

JFMK

View full text Add to dashboard Cite

Abstract:We determined the effects of an acute bout of free-weight resistance exercise (ARE) on cardiovascular hemodynamics and endothelial function in resistance-trained individuals. Nineteen young, healthy, resistance-trained individuals performed two randomized sessions consisting of ARE or a quiet control (CON). The ARE consisted of three sets of 10 repetitions at 75% 1-repetition maximum for the squat, bench press, and deadlift. Cardiovascular hemodynamics was assessed using finger photoplethysmography. Forearm blood flow (FBF), and vasodilatory capacity markers, were assessed using venous occlusion plethysmography. Forearm vascular conductance was calculated by the division of mean FBF by mean arterial pressure. A two-way ANOVA was used to compare the effects of condition (ARE, CON) across time (rest, recovery). There were significant (p ≤ 0.05) decreases in mean arterial pressure and total peripheral resistance across conditions and time. There were significant condition-by-time interactions (p ≤ 0.05) for heart rate, stroke volume, and cardiac output after the ARE compared to the CON and rest. FBF was significantly (p = 0.001) increased during the recovery from ARE, as well as vasodilatory capacity markers such as peak blood flow (p = 0.05) and reactive hyperemia-induced blood flow (p = 0.0001). These data suggest that whole-body free-weight exercises acutely reduced blood pressure while simultaneously augmenting FBF, and vasodilatory capacity markers.

show abstract

Section: Discussionsupporting

confidence: 91%

Changes in Endothelial Function after Acute Resistance Exercise Using Free Weights

Tai

Marshall

Parks

et al. 2018

JFMK

View full text Add to dashboard Cite

show abstract

“…The greater subacute pressor responses to resistance exercise may result in a more favorable resetting of the baroreflex (49), augmenting vagal outflow for a longer stay of time. Resetting with resistance training may occur with no change in BRS at the new operating point (49).…”

Section: Discussionmentioning

confidence: 99%

C-reactive protein and cardiac vagal activity following resistance exercise training in young African-American and white men

Heffernan¹,

Jae²,

Vieira³

et al. 2009

American Journal of Physiology-Regulatory, Integrative and Comp

View full text Add to dashboard Cite

B. C-reactive protein and cardiac vagal activity following resistance exercise training in young African-American and white men. Am J Physiol Regul Integr Comp Physiol 296: R1098-R1105, 2009. First published February 4, 2009 doi:10.1152 doi:10. /ajpregu.90936.2008 Americans have a greater prevalence of hypertension and diabetes compared with white Americans, and both autonomic dysregulation and inflammation have been implicated in the etiology of these disease states. The purpose of this study was to examine the cardiac autonomic and systemic inflammatory response to resistance training in young African-American and white men. Linear (time and frequency domain) and nonlinear (sample entropy) heart rate variability, baroreflex sensitivity, tonic and reflex vagal activity, and postexercise heart rate recovery were used to assess cardiac vagal modulation. C-reactive protein (CRP) and white blood cell count were used as inflammatory markers. Twenty two white and 19 African-American men completed 6 wk of resistance training followed by 4 wk of exercise detraining (Post 2). Sample entropy, tonic and reflex vagal activity, and heart rate recovery were increased in white and African-American men following resistance training (P Ͻ 0.05). Following detraining (Post 2), sample entropy, tonic and reflex vagal activity, and heart rate recovery returned to baseline values in white men but remained above baseline in African-American men. While there were no changes in white blood cell count or CRP in white men, these inflammatory markers decreased in African-American men following resistance training, with reductions being maintained following detraining (P Ͻ 0.05). In conclusion, resistance training improves cardiac autonomic function and reduces inflammation in African-American men, and these adaptations remained after the cessation of training. Resistance training may be an important lifestyle modification for improving cardiac autonomic health and reducing inflammation in young African-American men.heart rate variability; exercise; heart rate recovery; inflammation

show abstract

“…To control for the effects of breathing on heart rate variability, each subject was instructed to hold her breath in the middle of an exhalation 5 seconds before application of negative pressure. 35 Blood pressure was recorded during the 15-second breath-hold by not engaging the automatic calibration function of the Finapres. MAP recorded 2 seconds before application of negative pressure was used to compute the prestimulus estimated carotid sinus pressure (ECSP) (MAP-applied negative pressure).…”

Section: Testing Protocolmentioning

confidence: 99%

“…Signals were input to a Grass model 7P511 amplifier and 78D recorder to record maximal R-R intervals during the first 5 seconds of the stimulus for analysis of baroreflex response. 35 A record of the R-R interval was triggered by input of pressure change detected by the PT5 transducer with the 7P122 amplifier to an ANL-300 dual-threshold comparator (MED Associates, Inc). R-R signals were sent to a DIG-150 one shot (MED Associates) and held for 40 milliseconds for sampling by a model ANL 947 12-bit analog-to-digital convertor (MED Associates) at a sampling rate of 100/s.…”

Section: Testing Protocolmentioning

confidence: 99%

Autonomic responses of women with parental hypertension. Effects of physical activity and fitness.

1994

View full text Add to dashboard Cite

We studied the moderating effects of cardiorespiratory fitness and physical activity on heart rate and blood pressure responses to psychophysiological stressors and the carotid-cardiac baroreflex in young normotensive women with a parental history of hypertension (n=31). Testing occurred during the follicular menstrual phase. Subjects were divided into high versus moderate (46.6±6.5 versus 35.9±1.9 mL-kg^1 • min" 1 ) Vo 2peak and high versus moderate (1217.7±98.4 versus 1015.5±49.4 J-kg" 1 -wk~') physical activity groups. The groups did not differ in heart rate or blood pressure responses to mental arithmetic or the cold-face test. However, the highly fit women had longer maximal R-R intervals compared with the moderately fit women when the carotid-cardiac baroreflex was stimulated by negative pressures applied to the neck during resting conditions (/ ) <.O1). The carotid-cardiac baroreflex was P hysical inactivity is an independent risk factor for coronary heart disease, and regular physical activity has an accepted role in primary and secondary prevention of cardiovascular diseases, including mild hypertension.13 However, mechanisms underlying the salutary effect of exercise on cardiovascular health are not fully known and have not received much study in women. -5Hyperresponsiveness of the sympathetic nervous system to psychophysiological stressors is an established model for studying the etiology of coronary heart disease, atherosclerosis, and primary hypertension. 6 -13 Some investigators 14 " 16 have reported that cardiorespiratory fitness is associated with lower sympathetic responsiveness to various stressors (see Crews and Landers 17 for a review), while others 1823 have found no effect (see Peronnet and Szabo 24 for a review). The controversy in this area can be explained partly by a lack of standardization in the measurement of fitness, physical activity, sympathetic activity, and stressor tasks. Few controlled training studies have been reported. Most studies using cross-sectional designs have relied on indirect estimates of fitness or unvalidated self-reports of physical activity. Effects of fitness and physical activity have not been compared directly. Plasma catecholamine levels have been used to estimate sympathetic activity in about a dozen published reports, 2224 but most studies in this area have measured heart rate and blood pressure Received March 29, 1994; accepted in revised form July 1, 1994. From the Department of Exercise Science, The University of Georgia, Athens.Reprint requests to Janet Buckworth, PhD, Exercise Science Laboratory, Georgia College, Milledgeville, GA 31061.© 1994 American Heart Association, Inc.attenuated during mental arithmetic compared with rest in both the moderately fit and moderately active women but not in the highly fit and highly active groups. We find no evidence that aerobic fitness reduces sympathetic responses to laboratory stressors in young women with parental hypertension. Our findings are consistent with greater parasympathetic tone during sy...

show abstract

Carotid-cardiac baroreflex response and LBNP tolerance following resistance training

Cited by 32 publications

References 0 publications

Changes in Endothelial Function after Acute Resistance Exercise Using Free Weights

Changes in Endothelial Function after Acute Resistance Exercise Using Free Weights

C-reactive protein and cardiac vagal activity following resistance exercise training in young African-American and white men

Autonomic responses of women with parental hypertension. Effects of physical activity and fitness.

Contact Info

Product

Resources

About