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https://www.readbyqxmd.com/read/29352290/correction-association-of-physical-capacity-with-heart-rate-variability-based-on-a-short-duration-measurement-of-resting-pulse-rate-in-older-adults-with-obesity
#1
Chun-De Liao, Jau-Yih Tsauo, Dun-Jen Hsiao, Tsan-Hon Liou, Shih-Wei Huang, Li-Fong Lin
[This corrects the article DOI: 10.1371/journal.pone.0189150.].
2018: PloS One
https://www.readbyqxmd.com/read/29351493/test-retest-reliability-of-the-unsupported-upper-limb-exercise-test-uulex-and-6-min-peg-board-ring-test-6pbrt-in-healthy-adult-individuals
#2
Vanessa Pereira Lima, Marcelo Velloso, Fabiana Damasceno Almeida, Bianca Carmona, Giane Amorim Ribeiro-Samora, Tania Janaudis-Ferreira
BACKGROUND: The unsupported upper-limb exercise (UULEX) and 6-min peg board ring tests (6PBRTs) have been developed to measure peak unsupported arm exercise capacity and arm endurance, respectively, in individuals with chronic obstructive pulmonary disease. These tests are valid and reproducible in this population; however, the reproducibility of healthy adults is currently unknown. OBJECTIVE: To determine the within-day test-retest reliability of the UULEX and 6PBRT in healthy adults...
January 19, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29351473/sympathetically-mediated-cardiac-responses-to-isolated-muscle-metaboreflex-activation-following-exercise-are-modulated-by-body-position-in-humans
#3
André L Teixeira, Mauricio Daher, Mayara Souza, Plinio Santos Ramos, James P Fisher, Lauro C Vianna
Isolated muscle metaboreflex activation with post-handgrip exercise ischemia (PEI) increases sympathetic nerve activity and partially maintains the exercise-induced increase in blood pressure, but a smaller heart rate (HR) response occurs. The cardiopulmonary baroreceptors, mechanically sensitive receptors that respond to changes in central blood volume and pressure, are strongly associated with changes in body position and upon activation elicit reflex sympathoinhibition. Here, we tested the hypothesis that postural changes modulate the sympathetically-mediated cardiac response to PEI in humans...
December 15, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29351468/gabaergic-contribution-to-the-muscle-mechanoreflex-mediated-heart-rate-responses-at-the-onset-of-exercise-in-humans
#4
André L Teixeira, Plinio Santos Ramos, Milena Samora, Jeann L Sabino-Carvalho, Djalma Rabelo Ricardo, Eduardo Colombari, Lauro C Vianna
Previous studies indicated that central GABAergic mechanisms are involved in the heart rate (HR) responses at the onset of exercise. Based on previous research that showed similar increases in HR during passive and active cycling, we reasoned that the GABAergic mechanisms involved in the HR responses at the exercise onset is primarily mediated by muscle mechanoreceptors afferents. Therefore, in this study we sought to determine if central GABA mechanisms are involved in the muscle mechanoreflex-mediated HR responses at the onset of exercise in humans...
December 22, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29351160/acute-cardiorespiratory-and-metabolic-effects-of-a-sandbag-resistance-exercise-protocol
#5
Nicholas A Ratamess, Jie Kang, Jeremy D Kuper, Elizabeth A O'Grady, Nicole L Ellis, Ira T Vought, Emma Culleton, Jill A Bush, Avery D Faigenbaum
The purpose of the present study was to examine the acute cardiorespiratory and metabolic effects of a sandbag (SB) resistance exercise protocol and compare the responses to time-matched treadmill running protocols. Eight healthy, resistance-trained men (21.1 ± 1.0 years; 86.1 ± 7.8 kg) completed four protocols of equal duration in random sequence: 1) SB, 2) treadmill running at 60% of VO2 reserve (60VO2R), 3) treadmill running at 80% of VO2 reserve (80VO2R), and 4) a control protocol. The SB protocol was 16 min in duration and consisted of 3 circuits of 8 multiple-joint exercises (with 11-, 20-, or -48 kg sandbags) performed for as many repetitions as possible for 20 sec followed by a 10-sec rest interval prior to beginning the next exercise...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29350194/detection-rate-of-fetal-distress-using-contraction-dependent-fetal-heart-rate-variability-analysis
#6
Guy J J Warmerdam, Rik Vullings, Judith O E H Van Laar, M Beatrijs Van der Hout-Van der Jagt, Jan W M Bergmans, Lars Schmitt, S Guid Oei
Monitoring of the fetal condition during labor is currently performed by cardiotocography (CTG). Despite the use of CTG in clinical practice, CTG interpretation suffers from a high inter- and intra-observer variability and a low specificity. In addition to CTG, analysis of fetal heart rate variability (HRV) has been shown to provide information on fetal distress. However, fetal HRV can be strongly influenced by uterine contractions, particularly during the second stage of labor. Therefore, the aim of this study is to examine if distinguishing contractions from rest periods can improve the detection rate of HRV features for fetal distress during the second stage of labor...
January 19, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29349635/the-diving-reflex-and-asphyxia-working-across-species-in-physiological-ecology
#7
Joel B Hagen
Beginning in the mid-1930s the comparative physiologists Laurence Irving and Per Fredrik (Pete) Scholander pioneered the study of diving mammals, particularly harbor seals. Although resting on earlier work dating back to the late nineteenth century, their research was distinctive in several ways. In contrast to medically oriented physiology, the approaches of Irving and Scholander were strongly influenced by natural history, zoology, ecology, and evolutionary biology. Diving mammals, they argued, shared the cardiopulmonary physiology of terrestrial mammals, but evolution had modified these basic adaptive processes in extreme ways...
January 18, 2018: History and Philosophy of the Life Sciences
https://www.readbyqxmd.com/read/29345542/effects-of-late-night-training-on-slow-wave-sleep-episode-and-hour-by-hour-derived-nocturnal-cardiac-autonomic-activity-in-female-soccer-players
#8
Júlio A Costa, João Brito, Fábio Y Nakamura, Eduardo M Oliveira, António N Rebelo
PURPOSE: To assess the sensitivity of nocturnal heart rate variability (HRV) monitoring methods to the effects of late-night soccer training sessions in female athletes. METHODS: Eleven female soccer players competing in the 1st division of the Portuguese soccer league wore HR monitors during night-sleep throughout a one-week competitive in-season microcycle, after late-night training sessions (n = 3) and rest days (n = 3). HRV was analyzed through "slow-wave sleep episode" (SWSE; 10 min duration) and "hour-by-hour" (all the RR intervals recorded throughout the hours of sleep)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29344539/agreement-between-heart-failure-patients-and-their-primary-caregivers-on-symptom-assessment
#9
Hassan Sharifi, Mohammad Ali Rezaei, Nastaran Heydari Khayat, Neda Mohammadinia
Background: To decrease the readmission rate of heart failure (HF) patients, patients and their caregivers (CGs) should participate in symptoms assessment. This study aimed to assess the agreement between HF patients and their CGs on symptoms assessment. Methods: Using a correlational design, 100 HF patients with their CGs (100 dyads) were recruited from Department of Cardiology, Iranshahr, during August-December 2014. Data were collected using modified Heart Failure Symptom Survey (HFSS)...
January 2018: International Journal of Community Based Nursing and Midwifery
https://www.readbyqxmd.com/read/29343839/musical-auditory-stimulus-acutely-influences-heart-rate-dynamic-responses-to-medication-in-subjects-with-well-controlled-hypertension
#10
Eli Carlos Martiniano, Milana Drumond Ramos Santana, Érico Luiz Damasceno Barros, Maria do Socorro da Silva, David Matthew Garner, Luiz Carlos de Abreu, Vitor E Valenti
Music can improve the efficiency of medical treatment when correctly associated with drug action, reducing risk factors involving deteriorating cardiac function. We evaluated the effect of musical auditory stimulus associated with anti-hypertensive medication on heart rate (HR) autonomic control in hypertensive subjects. We evaluated 37 well-controlled hypertensive patients designated for anti-hypertensive medication. Heart rate variability (HRV) was calculated from the HR monitor recordings of two different, randomly sorted protocols (control and music) on two separate days...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29342011/utility-of-time-and-frequency-domain-parameters-of-heart-rate-variability-in-the-context-of-autonomic-disorders-characterized-by-orthostatic-dysfunction
#11
Jacquie Baker, Juan M Racosta, Brittany Balint, Kurt Kimpinski
PURPOSE: The clinical significance of heart rate variability in the context of autonomic dysfunction continues to be a matter of debate. A consensus is lacking on the best heart rate variability measures for clinical purposes. Therefore, the purpose of this study was to investigate the utility of heart rate variability parameters in healthy versus autonomic dysfunction. METHODS: Healthy young (n = 134), healthy older (n = 32), and patients with mild (postural tachycardia syndrome; n = 25) and severe (neurogenic orthostatic hypotension; n = 34) autonomic dysfunction were included...
January 16, 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29339992/effects-of-passive-and-active-rest-on-physiological-responses-and-time-motion-characteristics-in-different-small-sided-soccer-games
#12
Ersan Arslan, Utku Alemdaroglu, Yusuf Koklu, Tahir Hazir, Surhat Muniroglu, Baris Karakoc
The purpose of this study was to investigate the effects of resting regimes on physiological responses and time motion characteristics between bouts during small sided games (SSGs) in young soccer players. Sixteen players (average age 16.87 ± 0.34 years; body height 176.69 ± 3.21 cm; body mass 62.40 ± 2.59 kg; training experience 3.75 ± 0.44 years) performed four bouts 2-a-side, 3-a-side and 4-a-side games with three minutes active (SSGar: Running at 70% of HRmax) and passive (SSGpr) rest between bouts at two-day intervals...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29338020/autonomic-stress-reactivity-and-craving-in-individuals-with-problematic-internet-use
#13
Tania Moretta, Giulia Buodo
The link between autonomic stress reactivity and subjective urge/craving has been less systematically examined in behavioral addictions (i.e. problematic Internet use) than in substance use disorders. The present study investigated whether problematic Internet users (PU) show enhanced autonomic stress reactivity than non-PU, indexed by lower Heart Rate Variability (HRV) and higher Skin Conductance Level (SCL) reactivity during the Trier Social Stress Test (TSST), whether greater reactivity is related to stronger Internet craving, and whether problematic Internet usage is associated with some dysfunctional psychological features...
2018: PloS One
https://www.readbyqxmd.com/read/29333996/energy-expenditure-and-intensity-of-active-video-games-in-children-and-adolescents
#14
Karina L R Canabrava, Fernanda R Faria, Jorge R P de Lima, Dartagnan P Guedes, Paulo R S Amorim
PURPOSE: This study aimed to compare the energy expenditure and intensity of active video games to that of treadmill walking in children and adolescents. METHOD: Seventy-two boys and girls (aged 8-13 years) were recruited from local public schools. Energy expenditure and heart rate were measured during rest, during 3-km/hr, 4-km/hr, and 5-km/hr walks, and during active games (Adventure, Boxing I, Boxing II, and Dance). During walking and active games, we also assessed physical activity using an accelerometer...
January 15, 2018: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/29324835/subject-specific-pulse-wave-propagation-modeling-towards-enhancement-of-cardiovascular-assessment-methods
#15
Jan Poleszczuk, Malgorzata Debowska, Wojciech Dabrowski, Alicja Wojcik-Zaluska, Wojciech Zaluska, Jacek Waniewski
Cardiovascular diseases are the leading cause of death worldwide. Pulse wave analysis (PWA) technique, which reconstructs and analyses aortic pressure waveform based on non-invasive peripheral pressure recording, became an important bioassay for cardiovascular assessment in a general population. The aim of our study was to establish a pulse wave propagation modeling framework capable of matching clinical PWA data from healthy individuals on a per-subject basis. Radial pressure profiles from 20 healthy individuals (10 males, 10 females), with mean age of 42 ± 10 years, were recorded using applanation tonometry (SphygmoCor, AtCor Medical, Australia) and used to estimate subject-specific parameters of mathematical model of blood flow in the system of fifty-five arteries...
2018: PloS One
https://www.readbyqxmd.com/read/29324640/heart-rate-variability-frequency-domain-alterations-among-healthy-nurses-exposed-to-prolonged-work-stress
#16
Rossana Borchini, Giovanni Veronesi, Matteo Bonzini, Francesco Gianfagna, Oriana Dashi, Marco Mario Ferrario
The deregulation of the autonomic nervous system assessed through the heart rate variability (HRV) analysis is a promising pathway linking work stress and cardiovascular diseases. We aim to investigate the associations between HRV High Frequency (HF) and Low Frequency (LF) powers and work stress in a sample of 36 healthy nurses. Perceived work stress was assessed twice one year apart, using the Job Content and Effort Reward Imbalance questionnaires. This allows to classify nurses in three exposure groups: "prolonged high stress" (PHS), "recent high stress" (RHS) and "stable low stress" (SLS)...
January 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29324576/intermittent-cooling-during-judo-training-in-a-warm-humid-environment-reduces-autonomic-and-hormonal-impact
#17
Eduardo Carballeira, José Morales, David H Fukuda, María L Granada, Vicente Carratalá-Deval, Alfonso López Díaz de Durana, Jeffrey R Stout
The purpose of this study was to identify the effects of superficial cooling on physiological responses while training in a warm, humid environment during an international judo training camp. Sixteen judokas (8 women and 8 men) participated in the experiment. Four high-level women and four men were randomly assigned to wear a cooling vest (vest group, VG) during the recovery periods within a training session (i.e. 8 bouts of 5 min fighting with 5 min rest) and up to 10 min after the session, while the remaining athletes in the control group (CG) trained without the use of any cooling aids...
January 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29317056/a-potentially-curative-fetal-intervention-for-hypoplastic-left-heart-syndrome
#18
Andrew T Hattam
Hypoplastic left heart syndrome (HLHS) encapsulates a spectrum of complex congenital cardiovascular malformations involving varying degrees of underdevelopment of the left-sided heart structures. However, despite improved survival rates since the introduction of staged surgical reconstruction, treatment options for HLHS remain palliative rather than curative. A major limiting factor in the development of definitive curative therapy for HLHS is an incomplete understanding of its pathogenesis. Currently, the aetiology HLHS is best conceptualised by the 'flow theory' of cardiogenesis, which states that normal cardiac development is reliant on the interrelationship of normal flow patterns of blood through the developing heart, and appropriate growth of the cardiac valves and myocardium...
January 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29316211/prehypertension-is-a-comorbid-state-with-autonomic-and-metabolic-dysfunction
#19
Mi-Hyang Jung, Sang-Hyun Ihm, Dong-Hyeon Lee, Young Choi, Woo-Baek Chung, Hae Ok Jung, Kyung-Soon Hong, Ho-Joong Youn
We aimed to elucidate the role of autonomic dysfunction in the context of complex metabolic and cardiovascular changes in subjects with prehypertension. We identified 556 asymptomatic subjects without hypertension who underwent comprehensive cardiovascular exams. We obtained heart rate recovery (HRR) after peak exercise to quantitatively measure autonomic dysfunction. Of the 556 participants, 279 individuals had prehypertension and the remaining 277 had optimal BP. HRR was significantly lower in the prehypertension group (36...
January 6, 2018: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/29316181/heart-rate-variability-and-baroreflex-sensitivity-in-bilateral-lung-transplant-recipients
#20
Timothée Fontolliet, Pietro Gianella, Vincent Pichot, Jean-Claude Barthélémy, Paola Gasche-Soccal, Guido Ferretti, Frédéric Lador
The effects of lung afferents denervation on cardiovascular regulation can be assessed on bilateral lung transplantation patients. The high-frequency component of heart rate variability is known to be synchronous with breathing frequency. Then, if heart beat is neurally modulated by breathing frequency, we may expect disappearance of high frequency of heart rate variability in bilateral lung transplantation patients. On 11 patients and 11 matching healthy controls, we measured R-R interval (electrocardiography), blood pressure (Portapres® ) and breathing frequency (ultrasonic device) in supine rest, during 10-min free breathing, 10-min cadenced breathing (0·25 Hz) and 5-min handgrip...
January 9, 2018: Clinical Physiology and Functional Imaging
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