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heart rate variability and exercise

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https://www.readbyqxmd.com/read/29455794/effect-of-ventricular-function-and-volumes-on-exercise-capacity-in-adults-with-repaired-tetralogy-of-fallot
#1
Natalia Dłużniewska, Piotr Podolec, Tomasz Miszalski-Jamka, Maciej Krupiński, Paweł Banyś, Małgorzata Urbańczyk, Bogdan Suder, Grzegorz Kopeć, Maria Olszowska, Lidia Tomkiewicz-Pająk
OBJECTIVES: Investigate the effects of left and right ventricular function and severity of pulmonary valve regurgitation, quantified by cardiac magnetic resonance (CMR), on exercise tolerance in adult patients who underwent ToF repair at a young age. METHODS: This is a retrospective cohort study of 52 patients after ToF surgery and 33 age- and sex-matched healthy volunteers. CMR and cardiopulmonary exercise testing (CPET) were performed on all patients; CPET was performed on control subjects...
January 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29453755/effect-of-nicotine-on-repeated-bouts-of-anaerobic-exercise-in-nicotine-na%C3%A3-ve-individuals
#2
Robert Johnston, Melissa Crowe, Kenji Doma
PURPOSE: Nicotine is a psychostimulant that is reported to be commonly supplemented by athletes. The purpose of the current study was to determine the effects of a rapidly absorbed form of nicotine on repeated bouts of anaerobic exercise, perception of exertion and a range of cardiovascular variables while monitoring side effect profiles. METHODS: Sixteen healthy, nicotine naïve male athletes (24.1 ± 5.3 years, 179.0 ± 8.8 cm, 81.7 ± 13.5 kg, BMI 25.5 ± 3.0, Body fat% 13...
February 16, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29450240/improving-cerebral-oxygenation-cognition-and-autonomic-nervous-system-control-of-a-chronic-alcohol-abuser-through-a-three-month-running-program
#3
Daniel Aranha Cabral, Kell Grandjean da Costa, Alexandre Hideki Okano, Hassan Mohamed Elsangedy, Vanessa Paula Rachetti, Eduardo Bodnariuc Fontes
The abusive use of alcohol has shown to be associated to cerebral damage, impaired cognition, poor autonomic nervous control, impaired cardiovascular health, increased levels of stress and anxiety, depression symptoms and poor quality of life. Aerobic exercise has shown to be an efficient tool to reduce and overcome these issues. In this case report, a patient (forty-four years old, male) under treatment in public psychiatric hospital, classified as having a substance use disorder, underwent a three-month running program...
December 2017: Addictive Behaviors Reports
https://www.readbyqxmd.com/read/29449080/influence-of-exercise-modality-on-cardiac-parasympathetic-and-sympathetic-indices-during-post-exercise-recovery
#4
Scott Michael, Ollie Jay, Kenneth S Graham, Glen M Davis
OBJECTIVES: This study investigated indirect measures of post-exercise parasympathetic reactivation (using heart-rate-variability, HRV) and sympathetic withdrawal (using systolic-time-intervals, STI) following upper- and lower-body exercise. DESIGN: Randomized, counter-balanced, crossover. METHODS: 13 males (age 26.4±4.7years) performed maximal arm-cranking (MAX-ARM) and leg-cycling (MAX-LEG). Subsequently, participants undertook separate 8-min bouts of submaximal HR-matched exercise of each mode (ARM and LEG)...
February 12, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29446206/regression-equations-to-estimate-the-2-min-walk-distance-in-an-adult-asian-population-aged-40-75-years
#5
Fatim T Mirza, Sue Jenkins, Maria Justine, Nola Cecins, Kylie Hill
BACKGROUND AND OBJECTIVE: There is increased use of the 2-min walk test (2MWT) to assess functional exercise capacity. However, the distance achieved during this test may be difficult to interpret in the absence of reference values from a local population. Regression equations to estimate the 2-min walk distance (2MWD) only exist for American and Brazilian populations. The objective of this study was to develop regression equations to estimate the 2MWD in Malaysian adults who were free from major health problems...
February 14, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/29444412/heart-rate-variability-responses-to-acute-and-repeated-post-exercise-sauna-in-trained-cyclists
#6
Anthony S Leicht, Aaron Halliday, Wade H Sinclair, Shaun D'Auria, Martin Buchheit, Glen P Kenny, Jamie Stanley
Short- to medium-term (i.e. 4-14 days) heating protocols induce physiological adaptations including improved cardiac autonomic modulations, as assessed using heart rate variability, which may contribute to greater exercise performance. Whether similar cardiac autonomic changes occur during an intense heating protocol (sauna) reported to increase plasma volume in athletes remains to be confirmed. This study examined the changes in heart rate and its variability during a single, extreme heat (sauna) exposure and repeated exposures in athletes...
February 14, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29443739/effects-of-exercise-on-secretion-transport-inflammation-and-quality-of-life-in-patients-with-noncystic-fibrosis-bronchiectasis-protocol-for-a-randomized-controlled-trial
#7
Daniele Oliveira Dos Santos, Hugo Celso Dutra de Souza, José Antônio Baddini-Martinez, Ercy Mara Cipulo Ramos, Ada Clarice Gastaldi
BACKGROUND: Bronchiectasis is characterized by pathological and irreversible bronchial dilatation caused by the inefficient mucus and microorganism clearance and progression of inflammatory processes. The most frequent characteristic is the increase in bronchial mucus production resulting in slower transport and damage to the mucociliary transport. AIMS: To evaluate the effects of exercise on mucus transport, inflammation, and resistance of the respiratory and autonomic nervous systems and subsequent effects on quality of life in patients with bronchiectasis who are enrolled in a pulmonary rehabilitation program...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29422741/cardiopulmonary-and-metabolic-effects-of-yoga-in-healthy-volunteers
#8
T Satheesh Divya, M T Vijayalakshmi, K Mini, K Asish, M Pushpalatha, Varun Suresh
Background: Yoga the spiritual union of mind with the divine intelligence of the universe aims to liberate a human being from conflicts of body-mind duality. Beneficial cardiovascular and pulmonary effects of yoga are in par with aerobic exercise, even amounting to replace the exercise model. We conducted an interventional study in healthy volunteers, to analyze the impact of short-term yoga training on cardiovascular, pulmonary, autonomic function tests, lipid profile, and thyroid function tests...
September 2017: International Journal of Yoga
https://www.readbyqxmd.com/read/29420320/high-intensity-handgrip-training-lowers-blood-pressure-and-increases-heart-rate-complexity-among-postmenopausal-women-a-pilot-study
#9
Danielle C Bentley, Cindy H P Nguyen, Scott G Thomas
OBJECTIVE: Handgrip exercise is an emerging strategy for resting blood pressure (BP) reduction requiring minimal time and exercise effort. However, the research literature is currently limited to handgrip protocol designs predominantly prescribing sustained grip contractions, with little assessment of alternative options. Furthermore, our understanding of the utility of handgrip exercise would be strengthened by an evaluation of the physiological mechanisms driving BP reductions and an assessment of the interindividual response variability...
February 7, 2018: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/29414450/peak-circulatory-power-is-a-strong-prognostic-factor-in-patients-with-idiopathic-pulmonary-arterial-hypertension
#10
Yi Tang, Lei Yao, Zhihong Liu, Wenlin Xie, Xiuping Ma, Qin Luo, Zhihui Zhao, Zhiwei Huang, Liu Gao, Qi Jin, Xue Yu, Changming Xiong, Xinhai Ni, Yinkun Yan, Wenwei Qi
BACKGROUND: Studies have shown that peak circulatory power (peak CircP; peak oxygen uptake × peak systolic blood pressure) is a variable predictor of prognosis in patients with left heart failure. It remains unknown whether peak CircP also predicts outcome in patients with idiopathic pulmonary arterial hypertension (IPAH). METHODS: Patients with newly diagnosed IPAH who underwent symptom-limited cardiopulmonary exercise testing (CPET) from 1 January 2011 to 1 January 2014 in Fuwai Hospital were prospectively enrolled and followed for up to 66 months for cardiac events (mortality and lung transplantation)...
February 2018: Respiratory Medicine
https://www.readbyqxmd.com/read/29408911/effect-of-repeated-sprints-on-the-reliability-of-short-term-parasympathetic-reactivation
#11
Matteo Bonato, Andrea Meloni, Giampiero Merati, Antonio La Torre, Luca Agnello, Gianluca Vernillo
This study determined the reliability of post-exercise heart rate recovery (HRR) and vagal-related HR variability (HRV) after repeated-sprints (RSs), and contrasted it with the smallest worthwhile change (SWC) of these indices. Fourteen healthy male participants performed on four occasions, separated by 7 days, five 30-m sprints interspersed by 25-s of recovery. Post-exercise HR during 10 min of seated rest was measured. HRR during the first 60-s of recovery was computed (HRR60s). HRV indices were calculated in time and frequency domains during the last 5-min of the recovery...
2018: PloS One
https://www.readbyqxmd.com/read/29402785/family-physician-led-group-visits-for-lifestyle-modification-in-women-with-weight-problems-a-pilot-intervention-and-follow-up-study
#12
Merthan Tunay, Hatice Kurdak, Sevgi Özcan, Çiğdem Özdemir, Zeliha Yelda Özer
OBJECTIVE: Lifestyle modification requires extensive information sharing and counseling. However, one-on-one primary care consultations are lacking to cover all necessary components due to time constraints. This preliminary study aims to investigate the feasibility and effects of lifestyle-changing intervention by family physician-led group visits (GVs) on weight management in overweight and obese women. METHODS: 60 volunteers fulfilling the inclusion criteria were enrolled...
February 7, 2018: Obesity Facts
https://www.readbyqxmd.com/read/29402509/effects-of-aerobic-or-resistance-exercise-training-on-cardiovascular-autonomic-function-of-subjects-with-type-2-diabetes-a-pilot-study
#13
F Bellavere, V Cacciatori, E Bacchi, M L Gemma, D Raimondo, C Negri, K Thomaseth, M Muggeo, E Bonora, P Moghetti
BACKGROUND AND AIMS: Both aerobic (AER) and resistance (RES) training improve metabolic control in patients with type 2 diabetes (T2DM). However, information on the effects of these training modalities on cardiovascular autonomic control is limited. Our aim was to compare the effects of AER and RES training on cardiovascular autonomic function in these subjects. METHODS AND RESULTS: Cardiovascular autonomic control was assessed by Power Spectral Analysis (PSA) of Heart Rate Variability (HRV) and baroreceptors function indexes in 30 subjects with T2DM, randomly assigned to aerobic or resistance training for 4 months...
January 2, 2018: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29397314/overload-blunts-baroreflex-only-in-overreached-athletes
#14
Nicolas Bourdillon, Sasan Yazdani, Masih Nilchian, Alessio Mariano, Jean-Marc Vesin, Grégoire P Millet
OBJECTIVES: Heart rate variability (HRV) is commonly used to diagnose overreaching and monitor athletes' responses to training. Baroreflex sensitivity (BRS) is modified by changes in training load and might be another means to detect overreaching. The goal of this study was to assess BRS and HRV changes in two groups of athletes responding either negatively (FOR) or positively (AF) to similar training overload. DESIGN: Fifteen athletes performed 2-week baseline (BSL) training followed by 3-week overload (+45%; OVL) and 2-week recovery (-20%; RCV)...
January 31, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29395374/effects-of-weight-changes-in-the-autonomic-nervous-system-a%C3%A2-systematic-review-and-meta-analysis
#15
João Costa, André Moreira, Pedro Moreira, Luís Delgado, Diana Silva
BACKGROUND: Obesity has been linked to autonomic dysfunction, which is thought to be one of the main contributors for hypertension, cardiac remodelling and death. Exercise and diet-based weight loss are the mainstay therapy for obesity, but there is a paucity of data regarding the effect of weight changes in autonomic nervous system (ANS) activity. OBJECTIVE: To describe the impact of weight changes in autonomic nervous system. METHODS: A systematic literature search of four biomedical databases was performed evaluating effects of weight changes, thorough diet and/or exercise-based interventions, in the following ANS outcomes: heart rate variability, namely low frequency (LF)/high frequency (HF) ratio (LF/HF ratio), normalized units of LF (LFnu) and HF (HFnu), muscle sympathetic nerve activity (MSNA), noradrenaline spillover rate (NA-SR), standard deviation of normal-to-normal intervals (SDNN), root mean square of successive differences (RMSSD), baroreflex sensitivity and pupillometry...
January 9, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29377552/cardiorespiratory-fitness-exercise-hemodynamics-and-birth-outcomes-the-coronary-artery-risk-development-in-young-adults-cardia-study
#16
Abbi D Lane-Cordova, Mercedes R Carnethon, Janet M Catov, Samantha Montag, Cora E Lewis, Pamela J Schreiner, Annie Dude, Barbara Sternfeld, Sylvia E Badon, Philip Greenland, Erica P Gunderson
OBJECTIVE: Determine associations of cardiorespiratory fitness, exercise systolic blood pressure (SBP), and heart rate recovery (HRR) following a maximal exercise test performed years preceding pregnancy with odds of preterm birth (PTB; <37 weeks gestation) and small for gestational age (SGA; birthweight <10th percentile) delivery. DESIGN: Prospective, longitudinal. SETTING: Multi-site, observational cohort study initially consisting of 2,787 Black and White women aged 18-30 at baseline (1985-86) and followed for 25 years (Y25; 2010-11)...
January 29, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29370023/intraocular-pressure-response-to-maximal-exercise-test-during-recovery
#17
Eliska Najmanova, Frantisek Pluhacek, Michal Botek
SIGNIFICANCE: The main aim of this study was to determine the intraocular pressure (IOP) response to maximal incremental running test during 30 minutes of recovery. Exhaustive exercise induced a highly individually variable IOP response, which was related to its initial value and the initial heart rate. PURPOSE: The purpose of the study was to analyzed the IOP response to a maximal incremental running test in healthy women during a 30-minute recovery period. Secondarily, the study attempted to determine if the IOP was dependent on its baseline, maximal oxygen uptake, initial heart rate, and autonomic nervous system regulation...
January 25, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29369000/cardiorespiratory-repercussions-according-to-the-abdominal-circumference-measurement-of-men-with-obstructive-respiratory-disorder-submitted-to-respiratory-physiotherapy
#18
Bruno Martinelli, Valéria Amorim Pires Di Lorenzo, Robison José Quitério, Alexandre Ricardo Pepe Ambrozin, Eduardo Aguilar Arca, Maurício Jamami
PURPOSE: To examine the effect of respiratory physiotherapy among men with obstructive respiratory disorder, in relation to abdominal circumference (AC). METHODS: Quasi-experimental study including 26 men split into two groups according to AC(cm): 1) < 102 (ACrisk-free); and 2) ≥ 102 (ACrisk). Heart rate variability (HRV), diastolic blood pressure (DBP), oxygen saturation (SpO2), FEV1/FVC, slow vital capacity (SVC), inspiratory capacity (IC), maximal inspiratory pressure (PImax), thoracoabdominal amplitude (AI) were measured: before (M1); 5 min after the physiotherapy (i...
January 25, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29364349/characterization-of-cardiopulmonary-exercise-testing-variables-in-patients-with-endomyocardial-fibrosis-after-endocardial-resection
#19
Ana Luiza C Sayegh, Marcelo R Dos Santos, Patricia de Oliveira, Fábio Fernandes, Eduardo Rondon, Francis R de Souza, Vera M C Salemi, Maria Janieire de N N Alves, Charles Mady
BACKGROUND: Endomyocardial fibrosis (EMF) is a rare disease, characterized by diastolic dysfunction which leads to reduced peak oxygen consumption (VO2). Cardiopulmonary exercise testing (CPET) has been proved to be a fundamental tool to identify central and peripheral alterations. However, most studies prioritize peak VO2 as the main variable, leaving aside other important CPET variables that can specify the severity of the disease and guide the clinical treatment. OBJECTIVE: The aim of this study was to evaluate central and peripheral limitations in symptomatic patients with EMF by different CPET variables...
December 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29359592/performance-and-physiological-analysis-of-500-km-non-stop-cycling-a-case-study
#20
Pedro L Valenzuela, Carl Foster, Alejandro Lucía, Pedro de la Villa
Ultra-endurance sports have gained popularity over the last years. In this case, a well-trained cyclist completed 503.5 km non-stop (33.3 km.h-1). Speed and power output were reduced during the trial, being the reduction of power attributable to changes in pedal velocity rather than pedal forces. Heart rate (HR) showed an initial cardiovascular drift and progressively decreased independently of power. A decreased HR variability, a marked inflammatory response, signs of muscle damage and alterations of the haematological profile were observed after the trial...
January 23, 2018: Research in Sports Medicine
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