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https://www.readbyqxmd.com/read/28210990/indices-from-lagged-poincare-plots-of-heart-rate-variability-an-efficient-nonlinear-tool-for-emotion-discrimination
#1
Ateke Goshvarpour, Ataollah Abbasi, Atefeh Goshvarpour
Interest in human emotion recognition, regarding physiological signals, has recently risen. In this study, an efficient emotion recognition system, based on geometrical analysis of autonomic nervous system signals, is presented. The electrocardiogram recordings of 47 college students were obtained during rest condition and affective visual stimuli. Pictures with four emotional contents, including happiness, peacefulness, sadness, and fear were selected. Then, ten lags of Poincare plot were constructed for heart rate variability (HRV) segments...
February 16, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28205417/muscle-activation-and-heart-rate-responses-to-a-side-step-interval-exercise
#2
Robert S Thiebaud, Takashi Abe, Jonathan C Bravo, Nicolas Giovannitti, Avery P Sullivan
BACKGROUND: The side-step test is commonly used to assess agility. Side-step interval exercise may also be a potential way to improve cardiorespiratory and muscular fitness. However, the acute heart rate and muscle activation response to this type of exercise is not well established. In addition, different tempos can influence these responses. The purpose of this study was to determine the acute heart rate and muscle activation responses of a side-step interval exercise to different exercise tempos...
February 16, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28202808/a-broad-scale-comparison-of-aerobic-activity-levels-in-vertebrates-endotherms-versus-ectotherms
#3
James F Gillooly, Juan Pablo Gomez, Evgeny V Mavrodiev
Differences in the limits and range of aerobic activity levels between endotherms and ectotherms remain poorly understood, though such differences help explain basic differences in species' lifestyles (e.g. movement patterns, feeding modes, and interaction rates). We compare the limits and range of aerobic activity in endotherms (birds and mammals) and ectotherms (fishes, reptiles, and amphibians) by evaluating the body mass-dependence of VO2 max, aerobic scope, and heart mass in a phylogenetic context based on a newly constructed vertebrate supertree...
February 22, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28198783/effect-of-moderate-versus-high-intensity-interval-exercise-training-on-heart-rate-variability-parameters-in-inactive-latin-american-adults-a-randomised-clinical-trial
#4
Robinson Ramírez-Vélez, Alejandra Tordecilla-Sanders, Luis Andrés Téllez-T, Diana Camelo-Prieto, Paula Andrea Hernández-Quiñonez, Jorge Enrique Correa-Bautista, Antonio Garcia-Hermoso, Rodrigo Ramírez-Campillo, Mikel Izquierdo
We investigated the effect of moderate versus high-intensity interval exercise training on the HRV indices in physically inactive adults. Twenty inactive adults were randomly allocated to receive either moderate intensity training (MCT group) or high-intensity interval training (HIT group). The MCT group performed aerobic training at an intensity of 55-75%, which consisted of walking on a treadmill at 60-80% of the maximum heart rate (HRmax) until the expenditure of 300 kcal. The HIT group ran on a treadmill for 4 minutes at 85-95% peak HRmax and had a recovery of 4 minutes at 65% peak HRmax until the expenditure of 300 kcal...
February 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28197748/a-pilot-study-on-the-effects-of-slow-paced-breathing-on-current-food-craving
#5
Adrian Meule, Andrea Kübler
Heart rate variability biofeedback (HRV-BF) involves slow paced breathing (approximately six breaths per minute), thereby maximizing low-frequent heart rate oscillations and baroreflex gain. Mounting evidence suggests that HRV-BF promotes symptom reductions in a variety of physical and mental disorders. It may also positively affect eating behavior by reducing food cravings. The aim of the current study was to investigate if slow paced breathing can be useful for attenuating momentary food craving. Female students performed paced breathing either at six breaths per minute (n = 32) or at nine breaths per minute (n = 33) while watching their favorite food on the computer screen...
February 14, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/28197327/association-between-resting-heart-rate-and-inflammatory-markers-white-blood-cell-count-and-high-sensitivity-c-reactive-protein-in-healthy-korean-people
#6
Woo-Chul Park, Inho Seo, Shin-Hye Kim, Yong-Jae Lee, Song Vogue Ahn
BACKGROUND: Inflammation is an important underlying mechanism in the pathogenesis of atherosclerosis, and an elevated resting heart rate underlies the process of atherosclerotic plaque formation. We hypothesized an association between resting heart rate and subclinical inflammation. METHODS: Resting heart rate was recorded at baseline in the KoGES-ARIRANG (Korean Genome and Epidemiology Study on Atherosclerosis Risk of Rural Areas in the Korean General Population) cohort study, and was then divided into quartiles...
January 2017: Korean Journal of Family Medicine
https://www.readbyqxmd.com/read/28193707/arterial-pressure-heart-rate-and-cerebral-hemodynamics-across-the-adult-life-span
#7
Chang-Yang Xing, Takashi Tarumi, Rutger L Meijers, Marcel Turner, Justin Repshas, Li Xiong, Kan Ding, Wanpen Vongpatanasin, Li-Jun Yuan, Rong Zhang
Age-related alterations in systemic and cerebral hemodynamics are not well understood. The purpose of this study is to characterize age-related alterations in beat-to-beat oscillations in arterial blood pressure (BP), heart rate (HR), cerebral blood flow (CBF), cardiac baroreflex sensitivity, and dynamic cerebral autoregulation across the adult life span. We studied 136 healthy adults aged 21 to 80 years (60% women). Beat-to-beat BP, HR, and CBF velocity were measured at rest and during sit-stand maneuvers to mimic effects of postural changes on BP and CBF...
February 13, 2017: Hypertension
https://www.readbyqxmd.com/read/28192034/physiological-and-perceived-responses-in-different-levels-of-exergames-in-elite-athletes
#8
Louisa Ming Yan Chung, Feng Hua Sun, Chris Tsz Man Cheng
OBJECTIVE: Exergames have been suggested to increase the public's physical activity and to benefit cardiovascular health, particularly among the youth. However, not many studies compared the physiological and perceived responses between exergames and the authentic sports especially for elite athletes. This study aimed to investigate the physiological and perceived responses in different levels of Nintendo(®) Wii Fit™ U rowing exergames in one group of elite rowing athletes. MATERIALS AND METHODS: All participants were asked to perform the authentic rowing on the indoor rowing machine on the first day and to play the rowing exergames on the second day, in three levels with 1 hour rest between levels...
February 2017: Games for Health
https://www.readbyqxmd.com/read/28191625/iatrogenic-vascular-injuries-due-to-spinal-surgeries-endovascular-perspective
#9
Mustafa Gok, Elcin Aydin, Serkan Guneyli, Ali Akay, Celal Cinar, Ismail Oran
AIM: Iatrogenic vascular injuries due to spinal surgeries are rare but serious complications. Surgical management of these injuries is challenging with high morbidity rates. In this study we aim to present the results of endovascular management of iatrogenic vascular injuries due to spinal surgeries. MATERIAL AND METHODS: We retrospectively reviewed 11 patients (5 male, 6 female) who had vascular injuries due to cervical and lumbar spinal surgeries. Clinical findings were bleeding (n=5), leg edema (n=6) and right heart failure with severe dyspnea (n=1)...
January 17, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28188951/the-influence-of-adrenergic-stimulation-on-sex-differences-in-left-ventricular-twist-mechanics
#10
Alexandra M Williams, Rob E Shave, William S Cheyne, Neil D Eves
BACKGROUND: Sex differences in LV mechanics exist at rest and during acute physiological stress. Differences in cardiac autonomic and adrenergic control may contribute to sex differences in LV mechanics and LV hemodynamics. Accordingly, this study aimed to investigate sex differences in LV mechanics with altered adrenergic stimulation achieved through post handgrip exercise ischemia (PEI) and β1 -adrenergic receptor (AR) blockade. METHODS AND RESULTS: 20 males (23 ± 5 yr) and 20 females (22 ± 3 yr) were specifically matched for LV length (males: 8...
February 11, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28188470/modeling-the-effect-of-tilting-passive-leg-exercise-and-functional-electrical-stimulation-on-the-human-cardiovascular-system
#11
Amirehsan Sarabadani Tafreshi, Jan Okle, Verena Klamroth-Marganska, Robert Riener
Long periods of bed rest negatively affect the human body organs, notably the cardiovascular system. To avert these negative effects and promote functional recovery in patients dealing with prolonged bed rest, the goal is to mobilize them as early as possible while controlling and stabilizing their cardiovascular system. A robotic tilt table allows early mobilization by modulating body inclination, automated passive leg exercise, and the intensity of functional electrical stimulation applied to leg muscles (inputs)...
February 10, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28185666/-effects-of-a-recreational-general-physical-activity-program-with-short-term-and-moderate-intensity-of-blood-pressure-and-other-cardiovascular-risk-factors-in-hypertensive-patients-over-50-years-old
#12
Ana Torija Archilla, Javier Pérez González, Álvaro Sarmiento Ramírez, Enrique Fernández Sánchez, Josué Rubén González Ruiz, Rafael Guisado Barrilao
OBJECTIVES: To evaluate the effects of a recreational general physical activity program with moderate intensity and short duration on blood pressure and other cardiovascular risk factors (BMI, cholesterol, Rest Heart Rate, HDL, LDL, Triglycerides) in hypertensive patients older than 50years. DESIGN: Non-randomised pre-post design, quasi-experimental study. LOCATION: Íllora, Granada, Spain. PARTICIPANTS: A total of 60 subjects aged 50-75years taking part in the Health Hypertensive Program in the Medical Centre were selected...
February 6, 2017: Atencion Primaria
https://www.readbyqxmd.com/read/28183863/hemodynamic-responses-are-reduced-with-aerobic-compared-with-resistance-blood-flow-restriction-exercise
#13
Anthony K May, Christopher R Brandner, Stuart A Warmington
The hemodynamics of light-load exercise with an applied blood-flow restriction (BFR) have not been extensively compared between light-intensity, BFR, and high-intensity forms of both resistance and aerobic exercise in the same participant population. Therefore, the purpose of this study was to use a randomized crossover design to examine the hemodynamic responses to resistance and aerobic BFR exercise in comparison with a common high-intensity and light-intensity non-BFR exercise. On separate occasions participants completed a leg-press (resistance) or treadmill (aerobic) trial...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28178772/training-effects-of-wheelchair-dance-on-aerobic-fitness-in-bedridden-individuals-with-severe-athetospastic-cerebral-palsy-rated-to-gmfcs-level-v
#14
Kyoko Terada, Ayako Satonaka, Yasuto Terada, Nobuharu Suzuki
BACKGROUND: There were few studies about training effects of wheelchair dance on aerobic fitness in the bedridden individuals with severe cerebral palsy for whom the traditional maximal or submaximal exercise tests were not applicable. As the oxygen pulse (O2P), the oxygen uptake divided by the heart rate, is regarded to be a relative measure of stroke volume and the O2P correlates to peak oxygen uptake, we would be able to assess the training effects of wheelchair dance on aerobic fitness in those individuals measuring O2P...
February 8, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28177746/preliminary-safety-analysis-of-high-intensity-interval-training-hiit-in-persons-with-chronic-stroke
#15
Daniel L Carl, Pierce Boyne, Bradley Rockwell, Myron Gerson, Jane Khoury, Brett Kissela, Kari Dunning
The purpose of this study was to assess safety via electrocardiographic (ECG), blood pressure (BP), heart rate (HR), and orthopedic responses to 3 different high-intensity interval training (HIIT) protocols in persons with stroke. Eighteen participants (10 male; 61.9 + 8.3 years of age; 5.8 + 4.2 years poststroke) completed a symptom-limited graded exercise test (GXT) with ECG monitoring to screen for eligibility and determine HR peak. The 3 HIIT protocols involved repeated 30 s bursts of treadmill walking at maximum speed alternated with rest periods of 30 s (P30), 1 min (P60), or 2 min (P120)...
November 21, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28174436/cardiovascular-response-to-bouts-of-exercise-with-blood-flow-restriction
#16
Kestutis Bunevicius, Arturas Sujeta, Kristina Poderiene, Birute Zachariene, Viktoras Silinskas, Rimantas Minkevicius, Jonas Poderys
[Purpose] Occlusion training with low-intensity resistance exercises and blood flow restriction increases muscle cross-sectional area and strength. This form of training is used in rehabilitation; therefore, the aim of this study was to examine the effect of one occlusion training session on the cardiovascular response to bouts of exercise. [Subjects and Methods] Two groups took part: a control group without blood flow restriction and an experimental group with blood flow restriction. A single training session was used with the exercise intensity set at 40% of the one repetition maximum...
December 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28174302/free-energy-landscape-remodeling-of-the-cardiac-pacemaker-channel-explains-the-molecular-basis-of-familial-sinus-bradycardia
#17
Stephen Boulton, Madoka Akimoto, Sam Akbarizadeh, Giuseppe Melacini
The hyperpolarization-activated and cyclic-nucleotide modulated ion channel (HCN) drives the pacemaker activity in the heart, and its malfunction can result in heart disorders. One such disorder, familial sinus bradycardia, is caused by the S672R mutation in HCN, whose electrophysiological phenotypes include a negative shift in the channel activation voltage and an accelerated HCN deactivation. The outcomes of these changes are abnormally low resting heart rates. However, the molecular mechanism underlying these electrophysiological changes is currently not fully understood...
February 7, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28174110/cortical-and-cardiovascular-responses-to-acute-stressors-and-their-relations-with-psychological-distress
#18
Agostino Brugnera, Cristina Zarbo, Roberta Adorni, Giorgio A Tasca, Massimo Rabboni, Emi Bondi, Angelo Compare, Kaoru Sakatani
The purpose of this study was to assess the interrelation between cortical, cardiovascular, behavioural, and psychological responses to acute stressors in a large sample of healthy individuals. To date, there are only preliminary evidences for a significant association among these psychophysiological indexes during a stress task. 65 participants completed psychological questionnaires (Beck Depression Inventory and State-Trait Anxiety Inventory) and underwent a psychosocial math stress task, consisting of a control and an experimental (i...
February 4, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28167479/evaluation-on-curative-effect-and-safety-of-interventional-treatment-for-patients-with-acute-myocardial-infarction
#19
Yinchuan Zhu, Jianmin Tang, Feifei Pei
To evaluate the effectiveness and recent safety of emergency and selective percutaneous coronary intervention (PCI) in elderly patients (>80 years old) with acute myocardial infarction (AMI). 120 elderly patients with coronary heart disease (CHD) were divided into AMI group (with 55 cases) and non-myocardial infarction group (control group with 65 cases). Among the AMI group, there were 18 cases underwent emergency PCI within 12 hours after the onset, (AMI emergency PCI group), the rest 37 cases were AMI selective PCI group...
November 2016: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28166120/pulmonary-artery-wedge-pressure-relative-to-exercise-workrate-in-older-men-and-women
#20
Sam Esfandiari, Stephen P Wright, Jack M Goodman, Zion Sasson, Susanna Mak
PURPOSE: An augmented pulmonary artery wedge pressure (PAWP) response may explain exercise intolerance in some humans. However, routine use of exercise hemodynamic testing is limited by a lack of data from normal older men and women. Our objective was to evaluate the exercise PAWP response and the potential for sexual dimorphism in healthy, non-dyspneic older adults. METHODS: Thirty-six healthy volunteers [18 men (54±7 years)/18 women (58±6 years)] were studied at rest (Control) and during two stages of semi-upright cycle-ergometry, at heart rates of 100 bpm (Light Exercise) and 120 bpm (Moderate Exercise)...
February 4, 2017: Medicine and Science in Sports and Exercise
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