Relaxation during the evening and next-morning energy: The role of hassles, uplifts, and heart rate variability during work.

2020 ◽  
Vol 25 (2) ◽  
pp. 83-98
Author(s):  
Stacey L. Parker ◽  
Sabine Sonnentag ◽  
Nerina L. Jimmieson ◽  
Cameron J. Newton
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability

scholarly journals Role of increased sympathetic activity in the genesis of ambulatory ischemia: Spectral analysis of heart rate variability

1996 ◽  
Vol 27 (2) ◽  
pp. 398-399
Author(s):  
Tohru Kaji ◽  
Tetsuro Kohya ◽  
Fumishi Tomita ◽  
Tomohide Ono ◽  
Akira Kitabatake
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Sympathetic Activity

scholarly journals The Influence ofNrf2on Cardiac Responses to Environmental Stressors

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Reuben Howden ◽  
Eva Gougian ◽  
Marcus Lawrence ◽  
Samantha Cividanes ◽  
Wesley Gladwell ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Low Frequency ◽  
Therapeutic Strategies ◽  
Environmental Stressors ◽  
Total Power ◽  
Airborne Pollutants ◽  
Cardiac Responses

Nrf2protects the lung from adverse responses to oxidants, including 100% oxygen (hyperoxia) and airborne pollutants like particulate matter (PM) exposure, but the role ofNrf2on heart rate (HR) and heart rate variability (HRV) responses is not known. We hypothesized that genetic disruption ofNrf2would exacerbate murine HR and HRV responses to severe hyperoxia or moderate PM exposures.Nrf2-/-andNrf2+/+mice were instrumented for continuous ECG recording to calculate HR and HRV (low frequency (LF), high frequency (HF), and total power (TP)). Mice were then either exposed to hyperoxia for up to 72 hrs or aspirated with ultrafine PM (UF-PM). Compared to respective controls, UF-PM induced significantly greater effects on HR (P<0.001) and HF HRV (P<0.001) inNrf2-/-mice compared toNrf2+/+mice.Nrf2-/-mice tolerated hyperoxia significantly less thanNrf2+/+mice (~22 hrs;P<0.001). Reductions in HR, LF, HF, and TP HRV were also significantly greater inNrf2-/-compared toNrf2+/+mice (P<0.01). Results demonstrate thatNrf2deletion increases susceptibility to change in HR and HRV responses to environmental stressors and suggest potential therapeutic strategies to prevent cardiovascular alterations.

The relationship between phobic anxiety and 2-year readmission after Acute Coronary Syndrome: What is the role of heart rate variability?

2019 ◽  
Vol 247 ◽  
pp. 73-80 ◽  
Author(s):  
Adrienne O'Neil ◽  
C. Barr Taylor ◽  
David L. Hare ◽  
Emma Thomas ◽  
Samia R. Toukhsati ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Acute Coronary Syndrome ◽  
Coronary Syndrome ◽  
Phobic Anxiety ◽  
The Relationship

scholarly journals Heart rate variability in severe right or left heart failure: the role of pulmonary hypertension and resistances

2004 ◽  
Vol 6 (2) ◽  
pp. 181-185 ◽  
Author(s):  
Laurent Fauchier ◽  
Dominique Babuty ◽  
Alexandre Melin ◽  
Pierre Bonnet ◽  
Pierre Cosnay ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Pulmonary Hypertension ◽  
Heart Rate Variability ◽  
Left Heart ◽  
Left Heart Failure

scholarly journals 1010 Sleep Related Recovery in Athletes: The Role of Heart Rate Variability Parameters

SLEEP ◽  
2019 ◽  
Vol 42 (Supplement_1) ◽  
pp. A406-A407
Author(s):  
Shuli Eyal ◽  
Yuval Altman ◽  
Anda Baharav
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability

scholarly journals Behavioral Modification Enhances the Benefits from Structured Aerobic and Resistance Training

2019 ◽  
Vol 03 (02) ◽  
pp. E48-E57 ◽  
Author(s):  
Brett A. Dolezal ◽  
David M. Boland ◽  
Eric V. Neufeld ◽  
Jennifer L. Martin ◽  
Christopher B. Cooper
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Body Composition ◽  
Resistance Training ◽  
Aerobic Performance ◽  
Behavioral Modification ◽  
Lower Body ◽  
Fitness Measures ◽  
Lower Body Power

AbstractBehavioral modification (BM) is a strategy designed to sustain or restore well-being through effects such as enhanced relaxation, reduced stress, and improved sleep. Few studies have explored the role of BM delivered in the context of fitness programs for healthy adults. Thus, the purpose of this investigation was to examine whether BM combined with aerobic and resistance training programs would improve health and fitness measures more than the exercise training alone. Thirty-two healthy fitness club members (19 men) were randomized to receive a BM program (n=15) or an equal-attention (EA) control (n=17). BM consisted of twelve, 10-min education sessions between a trained fitness professional and the participant, coupled with weekly, individualized relaxation, stress reduction, and sleep improvement assignments. All participants engaged in 1 h of coached resistance training and remotely guided aerobic exercise thrice weekly for 12 weeks. Fitness measures (aerobic performance, body composition, muscle strength and endurance, lower-body power), sleep characteristics, and heart rate variability (HRV) were obtained at baseline and after the 12-week program. BM resulted in greater improvements in aerobic performance (increased maximum oxygen uptake, metabolic (lactate) threshold, and percent of maximum oxygen uptake at which metabolic threshold occurred), peak and average lower-body power, and body composition (decreased body fat percentage and fat mass) compared to EA. BM also positively influenced parasympathetic tone through increased High-frequency HRV. BM resulted in greater improvements in fitness measures, body composition, and heart rate variability compared with EA. These findings have intriguing implications regarding the role of BM in augmenting health and physical performance.

Frequency-domain Heart Rate Variability in 24-Hour Holter Recordings: Role of Spectral Method to Assess Circadian Patterns and Pharmacological Autonomic Modulation

2000 ◽  
Vol 33 (2) ◽  
pp. 147-157 ◽  
Author(s):  
Fabio Badilini ◽  
Pierre Maison-Blanche ◽  
Pierre Champomier ◽  
Jean Claude Provost ◽  
Philippe Coumel ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Frequency Domain ◽  
Spectral Method ◽  
Autonomic Modulation ◽  
Circadian Patterns ◽  
Holter Recordings

scholarly journals Endotoxin depresses heart rate variability in mice: cytokine and steroid effects

2009 ◽  
Vol 297 (4) ◽  
pp. R1019-R1027 ◽  
Author(s):  
Karen D. Fairchild ◽  
Jeffrey J. Saucerman ◽  
Laura L. Raynor ◽  
Joseph A. Sivak ◽  
Yuping Xiao ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
High Dose ◽  
Biphasic Response ◽  
Dexamethasone Treatment ◽  
Life Threatening ◽  
Surgical Implantation ◽  
Temporally Correlated

Heart rate variability (HRV) falls in humans with sepsis, but the mechanism is not well understood. We utilized a mouse model of endotoxemia to test the hypothesis that cytokines play a role in abnormal HRV during sepsis. Adult male C57BL/6 mice underwent surgical implantation of probes to continuously monitor electrocardiogram and temperature or blood pressure via radiotelemetry. Administration of high-dose LPS ( Escherichia coli LPS, 10 mg/kg, n = 10) caused a biphasic response characterized by an early decrease in temperature and heart rate at 1 h in some mice, followed by a prolonged period of depressed HRV in all mice. Further studies showed that LPS doses as low as 0.01 mg/kg evoked a significant decrease in HRV. With high-dose LPS, the initial drops in temperature and HR were temporally correlated with peak expression of TNFα 1 h post-LPS, whereas maximal depression in HRV coincided with peak levels of multiple other cytokines 3–9 h post-LPS. Neither hypotension nor hypothermia explained the HRV response. Pretreatment with dexamethasone prior to LPS significantly blunted expression of 7 of the 10 cytokines studied and shortened the duration of depressed HRV by about half. Interestingly, dexamethasone treatment alone caused a dramatic increase in both low- and high-frequency HRV. Administration of recombinant TNFα caused a biphasic response in HR and HRV similar to that caused by LPS. Understanding the role of cytokines in abnormal HRV during sepsis could lead to improved strategies for detecting life-threatening nosocomial infections in intensive care unit patients.

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