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heart rate variability and exercise

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https://www.readbyqxmd.com/read/29668530/cardiorespiratory-effects-of-air-pollution-in-a-panel-study-of-winter-outdoor-physical-activity-in-older-adults
#1
David M Stieb, Robin Shutt, Lisa Marie Kauri, Gail Roth, Mieczyslaw Szyszkowicz, Nina A Dobbin, Li Chen, Marc Rigden, Keith Van Ryswyk, Ryan Kulka, Branka Jovic, Marie Mulholland, Martin S Green, Ling Liu, Guillaume Pelletier, Scott A Weichenthal, Robert E Dales
OBJECTIVE: The aim of this study was to assess cardiorespiratory effects of air pollution in older adults exercising outdoors in winter. METHODS: Adults 55 years of age and older completed daily measurements of blood pressure, peak expiratory flow and oximetry, and weekly measurements of heart rate variability, endothelial function, spirometry, fraction of exhaled nitric oxide and urinary oxidative stress markers, before and after outdoor exercise, for 10 weeks...
April 17, 2018: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29668452/can-wearable-devices-accurately-measure-heart-rate-variability-a-systematic-review
#2
REVIEW
Konstantinos Georgiou, Andreas V Larentzakis, Nehal N Khamis, Ghadah I Alsuhaibani, Yasser A Alaska, Elias J Giallafos
BACKGROUND: A growing number of wearable devices claim to provide accurate, cheap and easily applicable heart rate variability (HRV) indices. This is mainly accomplished by using wearable photoplethysmography (PPG) and/or electrocardiography (ECG), through simple and non-invasive techniques, as a substitute of the gold standard RR interval estimation through electrocardiogram. Although the agreement between pulse rate variability (PRV) and HRV has been evaluated in the literature, the reported results are still inconclusive especially when using wearable devices...
March 1, 2018: Folia Medica
https://www.readbyqxmd.com/read/29667537/parasympathetic-activity-delayed-after-self-paced-exercise
#3
Lucas Rosiello Trojbicz, Mayara Vieira Damasceno, Leonardo Alves Pasqua, Arthur Fernandes Gáspari, Adriano Eduardo Lima-Silva, Rômulo Bertuzzi
The main purpose of this study was to compare the effect of the constant load and self-paced exercise with similar total work on autonomic control after endurance exercise. Ten physically active men were submitted to (i) a maximal incremental exercise test, (ii) a 4-km cycling time trial (4-km TT), and (iii) a constant workload test with identical total external work performed at 4-km TT. Gas exchange was measured throughout the tests, while blood lactate, heart rate, and heart rate variability (HRV) were measured during the passive recovery...
April 18, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29660948/the-cardiac-autonomic-nervous-system-response-to-different-daily-demands-among-patients-at-the-sub-acute-phase-post-ischemic-stroke-and-healthy-controls
#4
Noa Raphaely Beer, Nachum Soroker, Nathan M Bornstein, Michal Katz Leurer
BACKGROUND: Autonomic disturbances are a common phenomenon in patients' post-stroke, characterized by hypo function of the para-sympathetic and/or overactive sympathetic system. The impact of autonomic disturbances on physical therapy tasks during the rehabilitation period has not yet been assessed. OBJECTIVE: To describe the response of the cardiac autonomic nervous system during different tasks, among patients and age-matched healthy controls. METHODS: 19 patients in the subacute phase post first-ever ischemic stroke, and 16 controls...
April 7, 2018: NeuroRehabilitation
https://www.readbyqxmd.com/read/29656427/exercise-training-abrogates-age-dependent-loss-of-hypothalamic-oxytocinergic-circuitry-and-maintains-high-parasympathetic-activity
#5
Carla R Santos, Adriana Ruggeri, Alexandre Ceroni, Lisete C Michelini
Neuroanatomical studies associating neuronal tract tracing and immunohistochemistry identified reciprocal (ascending noradrenergic/descending oxytocinergic, OTergic) connections between brainstem cardiovascular nuclei and the paraventricular hypothalamic nucleus (PVN). Previous functional studies indicated that exercise training (T) augmented the expression/activity of OTergic pathway and improve the autonomic control of the heart. Knowing that ageing is associated with autonomic dysfunction and sinoaortic denervation blocked T-induced beneficial effects, we hypothesized that T was able to reduce age-dependent impairment by improving the afferent signaling to PVN and augmenting OTergic modulation of cardiovascular control...
April 14, 2018: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29629833/aerobic-exercise-training-differentially-affects-ace-c-and-n-domain-activities-in-humans-interactions-with-ace-i-d-polymorphism-and-association-with-vascular-reactivity
#6
Cléber Rene Alves, Tiago Fernandes, José Ribeiro Lemos, Flávio de Castro Magalhães, Ivani Credidio Trombetta, Guilherme Barreto Alves, Glória de Fátima Alves da Mota, Rodrigo Gonçalves Dias, Alexandre Costa Pereira, José Eduardo Krieger, Carlos Eduardo Negrão, Edilamar Menezes Oliveira
INTRODUCTION: Previous studies have linked angiotensin-converting enzyme ( ACE) insertion (I)/deletion (D) polymorphism (II, ID and DD) to physical performance. Moreover, ACE has two catalytic domains: NH2 (N) and COOH (C) with distinct functions, and their activity has been found to be modulated by ACE polymorphism. The aim of the present study is to investigate the effects of the interaction between aerobic exercise training (AET) and ACE I/D polymorphism on ACE N- and C-domain activities and vascular reactivity in humans...
April 2018: Journal of the Renin-angiotensin-aldosterone System: JRAAS
https://www.readbyqxmd.com/read/29622575/acupuncture-for-stable-angina-pectoris-a-systematic-review-protocol
#7
Mingxiao Yang, Ting Du, Mingsheng Sun, Hulin Long, Dehua Li, Zhifu Shen, Qiaofeng Wu, Lixing Lao, Fanrong Liang
INTRODUCTION: Previous reviews indicate that the effect of acupuncture on stable angina pectoris (SAP) remains controversial. The results of trials published in the past 5 years may possibly change this situation, but an updated systematic review is not available. We therefore designed this study to systematically assess the efficacy and safety of acupuncture for treating SAP. METHODS AND ANALYSIS: Nine online databases will be searched without language or publication status restrictions from their inception to September 2017...
April 4, 2018: BMJ Open
https://www.readbyqxmd.com/read/29621116/reliability-and-validity-of-the-6-minute-step-test-for-clinical-assessment-of-cardiorespiratory-fitness-in-people-at-risk-of-cardiovascular-disease
#8
Nicholas Giacomantonio, Paul Morrison, Roy Rasmussen, Marilyn J MacKay-Lyons
Giacomantonio, N, Morrison, P, Rasmussen, R, and MacKay-Lyons, MJ. Reliability and validity of the 6-minute step test for clinical assessment of cardiorespiratory fitness in people at risk of cardiovascular disease. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to determine the test-retest reliability and validity of the 6-minute step test (6MST) as a potential assessment of cardiorespiratory fitness (CRF) of people at risk of cardiovascular disease (CVD). A prospective, cross-sectional, correlational study design was used...
April 4, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29618165/small-arteries-stay-stiff-for-a-longer-period-following-vibration-exercises-in-combination-with-blood-flow-restriction
#9
Ulku Karabulut, Murat Karabulut, Eric G James
PURPOSE: The aim of this study was to assess the effect of isometric exercises performed during whole-body vibration (WBV) with and without blood flow restriction (BFR) on arterial elasticity and hemodynamic variables. METHODS: Eight male subjects performed static upper body (UB) and lower body (LB) exercises on a vibration platform with and without BFR. During BFR sessions, BFR cuffs were placed on the arms or legs and inflated to a target pressure. Exercises consisted of eight 45-s sets for UB, and ten 1-min sets for LB...
April 4, 2018: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29617473/exercise-tolerance-pulmonary-function-respiratory-muscle-strength-and-quality-of-life-in-children-and-adolescents-with-rheumatic-heart-disease
#10
Andressa Lais Salvador de Melo, Yasmin França Bezerra de Lira, Luziene Alencar Bonates Lima, Fabiana Cavalcanti Vieira, Alexandre Simões Dias, Lívia Barboza de Andrade
OBJECTIVE: Despite the high prevalence of rheumatic heart disease in Brazil, the occurrence of functional impairment in children and adolescents with rheumatic heart disease is not clear. The aim of this study was to evaluate exercise tolerance, respiratory muscle strength, lung function, and quality of life of children and adolescents with rheumatic heart disease. METHODS: Cross-sectional study, conducted from August to December 2014 with children and adolescents with rheumatic heart disease aged 8 to 16 years...
March 29, 2018: Revista Paulista de Pediatria: Orgão Oficial da Sociedade de Pediatria de São Paulo
https://www.readbyqxmd.com/read/29609921/a-comparison-of-the-cardiovascular-effects-of-simulated-and-spontaneous-laughter
#11
Mikaela M Law, Elizabeth A Broadbent, John J Sollers
OBJECTIVES: Laughter has long been regarded as beneficial for health, but the mechanisms are not clearly understood. The current study aimed to compare the acute cardiovascular effects of spontaneous and simulated laughter. DESIGN: A mixed factorial experiment was performed to examine changes in cardiovascular variables in response to experimental tasks across conditions. INTERVENTIONS: A sample of 72 participants were randomised to one of three 6 min interventions...
April 2018: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/29609475/effectiveness-of-a-smartphone-based-worry-reduction-training-for-stress-reduction-a-randomized-controlled-trial
#12
Anke Versluis, Bart Verkuil, Philip Spinhoven, Jos F Brosschot
OBJECTIVE: Perseverative cognition (e.g. worry) and unconscious stress are suggested to be important mediators in the relation between stressors and physiological health. We examined whether a smartphone-based worry-reduction training improved a physiological marker of stress (i.e. increased heart rate variability [HRV]) and unconscious stress. DESIGN: Randomised-controlled trial was conducted with individuals reporting work stress (n = 136). Participants were randomised to the experimental, control or waitlist condition (resp...
April 3, 2018: Psychology & Health
https://www.readbyqxmd.com/read/29599993/a-mixed-methods-study-of-tai-chi-exercise-for-patients-with-chronic-heart-failure-aged-70-years-and-older
#13
Lena Hägglund, Kurt Boman, Margareta Brännström
Aims and objectives: This study aimed to evaluate Tai Chi group training among patients with chronic heart failure (CHF) aged 70 years and older. Background: Physical activity is recommended for CHF treatment. Tai Chi is found to be beneficial to different patient groups, although few studies focus on older patients with CHF. Design: A mixed methods study. Participants were randomly assigned to Tai Chi training twice a week for 16 weeks ( N  =   25) or control ( N  =   20)...
April 2018: Nursing Open
https://www.readbyqxmd.com/read/29599870/effect-of-two-different-types-of-olympic-rotation-order-on-cardiovascular-and-metabolic-variables-in-men-s-artistic-gymnastics
#14
Bessem Mkaouer, Monèm Jemni, Helmi Chaabene, Samiha Amara, Ahmad Njah, Mokhtar Chtara
The rotation sequence-order differs from a gymnast to another according to the draw at the time of the qualifying competitions in men's artistic gymnastics. Only the six best gymnasts start on the floor exercises, the others could start on any of the other five apparatuses. It has been demonstrated that some gymnastics events are physiologically less taxing than others; hence some gymnasts could experience lower and/or higher levels of cardiovascular and metabolic stress compared to others, depending on the apparatus they start with...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29595875/impaired-autonomic-function-in-adolescents-born-preterm
#15
Kristin Haraldsdottir, Andrew M Watson, Kara N Goss, Arij G Beshish, David F Pegelow, Mari Palta, Laura H Tetri, Gregory P Barton, Melissa D Brix, Ryan M Centanni, Marlowe W Eldridge
Preterm birth temporarily disrupts autonomic nervous system (ANS) development, and the long-term impacts of disrupted fetal development are unclear in children. Abnormal cardiac ANS function is associated with worse health outcomes, and has been identified as a risk factor for cardiovascular disease. We used heart rate variability (HRV) in the time domain (standard deviation of RR intervals, SDRR; and root means squared of successive differences, RMSSD) and frequency domain (high frequency, HF; and low frequency, LF) at rest, as well as heart rate recovery (HRR) following maximal exercise, to assess autonomic function in adolescent children born preterm...
March 2018: Physiological Reports
https://www.readbyqxmd.com/read/29581653/effects-of-mechanical-bed-massage-on-exercise-induced-back-fatigue-in-athletes
#16
Houyong Zhong, Wichai Eungpinichpong, Xingze Wang, Uraiwon Chatchawan, Sawitri Wanpen, Orawan Buranruk
[Purpose] The study aimed to preliminarily investigate the effects of mechanical-bed massage on exercise-induced back fatigue in athletes. [Subjects and Methods] Twelve male college athletes, randomly allocated to experimental or control groups, were instructed to perform reverse sit-up for 8 sessions until they became fatigued. The experimental group received a 20-min mechanical-bed massage session, while the control group rested on a bed for the same period of time. Visual Analogue Scale (VAS) on perceived back muscle fatigue, back muscle endurance, and Heart Rate Variability (HRV) parameters including stress index (SI), HRV index, SDNN, RMSSD, pNN50, LF, HF, and LF/HF were analyzed...
March 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29570598/effects-of-resistance-training-on-cardiovascular-function-in-patients-with-peripheral-artery-disease-a-randomized-controlled-trial
#17
Ana P F Gomes, Marilia A Correia, Antônio H G Soares, Gabriel G Cucato, Aluísio H R A Lima, Bruno R Cavalcante, Dário C Sobral-Filho, Raphael M Ritti-Dias
Gomes, APF, Correia, MA, Soares, AHG, Cucato, GG, Lima, AHRA, Cavalcante, BR, Sobral-Filho, DC, and Ritti-Dias, RM. Effects of resistance training on cardiovascular function in patients with peripheral artery disease: A randomized controlled trial. J Strength Cond Res 32(4): 1072-1080, 2018-The aim of this study was to analyze the effects of resistance training on cardiovascular function of patients with peripheral artery disease (PAD). In total, 30 patients with PAD were invited to participate in this randomized controlled trial, randomly allocated to a control (n = 15, 66 ± 2 years; stretching and relaxation exercises) or resistance training group (n = 15, 60 ± 3 years; 3 sets of 10 repetitions of 8 whole-body exercises, with a 2-minute interval between sets)...
April 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29570571/cardiac-autonomic-and-blood-pressure-responses-to-an-acute-foam-rolling-session
#18
Kevin Lastova, Michael Nordvall, Michelle Walters-Edwards, Amy Allnutt, Alexei Wong
Foam Rolling (FR) is a self-myofascial release method that has become extremely popular among athletes and fitness enthusiasts for its ability to improve flexibility and range of motion and alleviate delayed onset muscle soreness. However, the cardiac autonomic modulation and blood pressure (BP) responses induced by an acute FR session are currently unknown. The present study evaluated the effects of an acute session of FR exercise on heart rate variability (HRV) and BP responses in healthy individuals. Fifteen (M=8, F=7) healthy subjects completed either a FR or non-exercise control trial in randomized order...
March 22, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29570539/comparison-between-slow-components-of-hr-and-v-combining-dot-above-o2-kinetics-functional-significance
#19
Lucrezia Zuccarelli, Simone Porcelli, Letizia Rasica, Mauro Marzorati, Bruno Grassi
PURPOSE: Aerobic exercise prescription is often based on a linear relationship between pulmonary oxygen consumption (V[Combining Dot Above]O2) and heart rate (HR). The aim of the present study was to test the hypothesis that during constant work rate (CWR) exercises at different intensities the slow component of HR kinetics occurs at lower work rate and is more pronounced that the slow component of V[Combining Dot Above]O2 kinetics. METHODS: Seventeen male (age, 27±4yr) subjects performed on a cycle ergometer an incremental exercise to voluntary exhaustion and several CWR exercises: 1) moderate CWR exercises (MODERATE), below gas exchange threshold (GET); 2) heavy CWR exercise (HEAVY), at 45% of the difference between GET and V[Combining Dot Above]O2 peak (□); 3) severe CWR exercise (SEVERE), at 95% of Δ; 4) "HRCLAMPED" exercise in which work rate was continuously adjusted to maintain a constant HR, slightly higher than that determined at GET...
March 22, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29549494/inspiratory-muscle-training-improves-physical-performance-and-cardiac-autonomic-modulation-in-older-women
#20
Gabriel Dias Rodrigues, Jonas Lírio Gurgel, Thiago Rodrigues Gonçalves, Pedro Paulo da Silva Soares
PURPOSE: Aging impairs the autonomic balance reducing the vagal and increasing the sympathetic components of heart rate variability (HRV) and this could be associated with a decline in physical capacity. Inspiratory muscle training (IMT) is a possible tool to attenuate this physical capacity decline in older women. The aim of this study was to investigate the influence of IMT in the older women on physical capacity and autonomic cardiac modulation at rest and post exercise. METHODS: 20 female participants 60-72 years old were randomly allocated in two groups...
March 16, 2018: European Journal of Applied Physiology
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