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Heart rate variability, training

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https://www.readbyqxmd.com/read/29166320/exercise-alters-gut-microbiota-composition-and-function-in-lean-and-obese-humans
#1
Jacob M Allen, Lucy J Mailing, Grace M Niemiro, Rachel Moore, Mark D Cook, Bryan A White, Hannah D Holscher, Jeffrey A Woods
PURPOSE: Exercise is associated with altered gut microbial composition, but studies have not investigated whether the gut microbiota and associated metabolites are modulated by exercise training in humans. We explored the impact of six weeks of endurance exercise on the composition, functional capacity, and metabolic output of the gut microbiota in lean and obese adults with multiple-day dietary controls prior to outcome variable collection. METHODS: Thirty-two lean (n=18 [9 female]) and obese (n=14 [11 female]), previously sedentary subjects participated in six weeks of supervised, endurance-based exercise training (3 days/wk) that progressed from 30 to 60 minutes/day and from moderate (60% of heart rate reserve [HRR]) to vigorous intensity (75% HRR)...
November 20, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29148065/improvement-in-low-upright-baroreflex-sensitivity-is-associated-with-positive-clinical-effect-of-orthostatic-training
#2
Peter Mitro, Miloš Simurda, Ervin Muller
AIM: To assess the clinical efficacy of orthostatic training (OT) and its effect on the autonomic activity. METHODS: OT was performed in 38 patients (13 males, age 36.4 ± 15.2 years). Baroreflex sensitivity (BRS), heart rate variability and quality of life (SF 36) was assessed before and after 6 months of OT. Patients with no recurrence of syncope and reduction of the presyncope number to one-third or less were classified as responders. RESULTS: Compliance to OT was low...
November 16, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29124506/heart-rate-variability-biofeedback-does-not-substitute-for-asthma-steroid-controller-medication
#3
Paul M Lehrer, Charles G Irvin, Shou-En Lu, Anthony Scardella, Beatrix Roehmheld-Hamm, Milisyaris Aviles-Velez, Jessica Graves, Evgeny G Vaschillo, Bronya Vaschillo, Flavia Hoyte, Harold Nelson, Frederick S Wamboldt
Despite previous findings of therapeutic effects for heart rate variability biofeedback (HRVB) on asthma, it is not known whether HRVB can substitute either for controller or rescue medication, or whether it affects airway inflammation. Sixty-eight paid volunteer steroid naïve study participants with mild or moderate asthma were given 3 months of HRVB or a comparison condition consisting of EEG alpha biofeedback with relaxing music and relaxed paced breathing (EEG+), in a two-center trial. All participants received a month of intensive asthma education prior to randomization...
November 9, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/29122951/dive-heart-rate-in-harbour-porpoises-is-influenced-by-exercise-and-expectations
#4
Birgitte I McDonald, Mark Johnson, Peter T Madsen
The dive response, a decrease in heart rate (ƒH) and peripheral vasoconstriction, is the key mechanism allowing breath-hold divers to perform long duration dives. This pronounced cardiovascular response to diving has been investigated intensely in pinnipeds, but comparatively little is known for cetaceans, in particular in ecologically relevant settings. Here we studied the dive ƒH response in one the smallest cetaceans, the harbour porpoise (Phocoena phocoena). We used a novel multi-sensor data logger to record dive behaviour, ƒH, ventilations and feeding events in three trained porpoises, providing the first evaluation of cetacean ƒH regulation while performing a variety of natural behaviours, including prey capture...
November 9, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29121287/analgesia-nociception-index-for-the-assessment-of-pain-in-critically-ill-patients-a-diagnostic-accuracy-study
#5
G Chanques, T Tarri, A Ride, A Prades, A De Jong, J Carr, N Molinari, S Jaber
Background: Behavioural pain tools are used in Intensive Care Unit (ICU) patients unable to self-report their pain-intensity but need sustained efforts to educate and train the ICU team because of the subjective nature of these clinical tools. This study measured the validity and performance of an electrophysiological monitoring tool based on the spectral analysis of heart rate variability, the Analgesia Nociception Index (ANI) which varies from 0 (minimal parasympathetic tone, maximal stress-response and pain) to 100 (maximal parasympathetic tone, minimal stress-response and pain)...
October 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29117964/clinical-characteristics-of-children-evaluated-for-suspected-pulmonary-embolism-with-d-dimer-testing
#6
Jessica Kanis, Jonathan Pike, Cassandra L Hall, Jeffrey A Kline
BACKGROUND: We sought to determine clinical variables in children tested for suspected pulmonary embolism (PE) that predict PE+ outcome for the development of paediatric PE prediction rule. METHODS: Data were collected by query of a laboratory database for D-dimer from January 2004 to December 2014 for a large multicentre hospital system and the radiology database for pulmonary vascular imaging in children aged 5-17. Using explicit, predefined methods, trained abstractors, determined if D-dimer was sent in the evaluation of PE and then recorded predictor data which was tested for association with PE+ outcome using univariate techniques...
November 8, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/29114536/short-term-combined-exercise-training-improves-cardiorespiratory-fitness-and-autonomic-modulation-in-cancer-patients-receiving-adjuvant-therapy
#7
Cristiano Mostarda, Jurema Castro-Filha, Andréa Dias Reis, Mário Sevílio, Carlos José Dias, Antonio Carlos Silva-Filho, João Batista Silva Garcia, Maria do Desterro Nascimento, Hélio José Coelho-Junior, Bruno Rodrigues
The present study aimed to investigate the impact of a short-term exercise training (ET) on the cardiorespiratory fitness and autonomic modulation of women with breast cancer who were receiving adjuvant radiotherapy, chemotherapy or hormonotherapy. Eighteen women previously diagnosed with breast cancer receiving adjuvant radiotherapy, chemotherapy or hormone therapy were randomly allocated into breast cancer nonexercise (BC) and exercise groups (BC+Ex). Moreover, nine healthy physically inactive volunteers were recruited to compose the noncancer control group (CG)...
October 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29112626/effects-of-ad-libitum-low-carbohydrate-high-fat-dieting-in-middle-age-male-runners
#8
Alexander J Heatherly, Lauren G Killen, Ashton F Smith, Hunter S Waldman, Angela Hollingsworth, Christie L Seltmann, Eric K O'Neal
PURPOSE: This study examined the effects of a 3-week ad libitum high fat (~70% of calories), low carbohydrate (<50 g/day) diet (LCHF) on markers of endurance performance in middle-aged, recreationally competitive male runners. METHODS: All subjects (n = 8) following their normal HC diet had anthropometric measures assessed and completed 5, 10-min running bouts at multiple individual race paces in the heat while physiological, metabolic variables and perceptual responses were recorded...
November 6, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29093566/hypertension-induces-additional-cardiometabolic-impairments-and-attenuates-aerobic-exercise-training-adaptations-in-fructose-fed-ovariectomized-rats
#9
Janaina de O Brito-Monzani, Iris Callado Sanches, Nathalia Bernardes, Kátia Ponciano, Ivana C Moraes-Silva, Maria-Cláudia Irigoyen, Susana Llesuy, Kátia De Angelis
We tested whether hypertension favors the development of additional cardiometabolic changes in fructose-fed ovariectomized rats and how it affects aerobic exercise training (ET) effects. All rats received fructose in drinking water (10%) beginning at weaning, were ovariectomized at 10 weeks of age and divided into the normotensive sedentary (NFOS) and trained (NFOT) and hypertensive sedentary (HFOS) and trained (HFOT) groups. ET was performed on a treadmill. Arterial pressure (AP) was directly recorded; heart rate and AP variabilities were analyzed...
November 2, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/29090400/no-effects-of-successful-bidirectional-smr-feedback-training-on-objective-and-subjective-sleep-in-healthy-subjects
#10
Olaf Binsch, Ellen S Wilschut, Martijn Arns, Charelle Bottenheft, Pierre J L Valk, Eric H G J M Vermetten
There is a growing interest in the application of psychophysiological signals in more applied settings. Unidirectional sensory motor rhythm-training (SMR) has demonstrated consistent effects on sleep. In this study the main aim was to analyze to what extent participants could gain voluntary control over sleep-related parameters and secondarily to assess possible influences of this training on sleep metrics. Bidirectional training of SMR as well as heart rate variability (HRV) was used to assess the feasibility of training these parameters as possible brain computer interfaces (BCI) signals, and assess effects normally associated with unidirectional SMR training such as the influence on objective and subjective sleep parameters...
October 31, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/29090214/agreement-between-electrocardiogram-and-heart-rate-meter-is-low-for-the-measurement-of-heart-rate-variability-during-exercise-in-young-endurance-horses
#11
Augustin Lenoir, Dagmar S Trachsel, Mohamed Younes, Eric Barrey, Céline Robert
Analysis of the heart rate variability (HRV) gains more and more importance in the assessment of training practice and welfare in equine industry. It relies on mathematical analyses of reliably and accurately measured variations in successive inter-beat intervals, measured as RR intervals. Nowadays, the RR intervals can be obtained through two different techniques: a heart rate meter (HRM) or an electrocardiogram (ECG). The agreement and reliability of these devices has not been fully assessed, especially for recordings during exercise...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29082831/a-mindfulness-training-program-based-on-brief-practices-m-pbi-to-reduce-stress-in-the-workplace-a-randomised-controlled-pilot-study
#12
M Arredondo, M Sabaté, N Valveny, M Langa, R Dosantos, J Moreno, L Botella
Work stress is a major contributor to absenteeism and reduced work productivity. A randomised and controlled study in employee-volunteers (with Perceived Stress Scale [PSS-14]>22) was performed to assess a mindfulness program based on brief integrated mindfulness practices (M-PBI) with the aim of reducing stress in the workplace. The PSS-14 of the employees before and after 8-weeks M-PBI program, as well as after a 20-week follow-up, was assessed (primary endpoint). The employees also carried the following questionnaires (secondary endpoints): Five Facet Mindfulness Questionnaire (FFMQ), Self-Compassion Scale (SCS), Experiences Questionnaire-Decentering (EQ-D), and Maslach Burnout Inventory-General Survey (MBI-GS)...
October 30, 2017: International Journal of Occupational and Environmental Health
https://www.readbyqxmd.com/read/29080964/effects-of-an-individualized-home-based-unsupervised-aerobic-training-on-body-composition-and-physiological-parameters-in-obese-adults-are-independent-of-gender
#13
G P Emerenziani, M C Gallotta, S Migliaccio, D Ferrari, E A Greco, F J Saavedra, S Iazzoni, A Aversa, L M Donini, A Lenzi, C Baldari, L Guidetti
PURPOSE: Evaluation of the effects of an individualized home-based unsupervised aerobic training on body composition, physical and physiological parameters in female and male obese adults. METHODS: Two hundred and twenty obese adults (age 47.9 ± 12.4 years; BMI 38.0 ± 7.2 kg/m(2)) entered the 4-month training program. Body composition, physiological and functional capacities were assessed pre- and post-intervention. All subjects were requested to perform unsupervised aerobic training with the intensity based on heart rate, walking speed and OMNI-RPE score corresponding to the individual ventilatory threshold for at least 5 days/week...
October 28, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29075623/new-frontiers-in-heart-rate-variability-and-social-coherence-research-techniques-technologies-and-implications-for-improving-group-dynamics-and-outcomes
#14
Rollin McCraty
Concepts embraced by the term coherence have been identified as central to fields such as quantum physics, physiology, and social science. There are different types of coherence, although the term always implies a harmonious relationship, correlations and connections between the various parts of a system. A specific measure derived from heart rate variability (HRV) provides a measure of physiological coherence. Another type of coherence, social coherence, relates to the harmonious alignment between couples or pairs, family units, small groups, or larger organizations in which a network of relationships exists among individuals who share common interests and objectives...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/29074280/premature-brain-aging-in-humans-exposed-to-maternal-nutrient-restriction-during-early-gestation
#15
Katja Franke, Christian Gaser, Susanne R de Rooij, Matthias Schwab, Tessa J Roseboom
BACKGROUND: Prenatal exposure to undernutrition is widespread in both developing and industrialized countries, causing irreversible damage to the developing brain, resulting in altered brain structure and decreased cognitive function during adulthood. The Dutch famine in 1944/45 was a humanitarian disaster, now enabling studies of the effects of prenatal undernutrition during gestation on brain aging in late adulthood. METHODS: We hypothesized that study participants prenatally exposed to maternal nutrient restriction (MNR) would demonstrate altered brain structure resembling premature brain aging in late adulthood, expecting the effect being stronger in men...
October 23, 2017: NeuroImage
https://www.readbyqxmd.com/read/29070027/absolute-and-relative-reliability-of-acute-effects-of-aerobic-exercise-on-executive-function-in-seniors
#16
Lars Donath, Sebastian Ludyga, Daniel Hammes, Anja Rossmeissl, Nadin Andergassen, Lukas Zahner, Oliver Faude
BACKGROUND: Aging is accompanied by a decline of executive function. Aerobic exercise training induces moderate improvements of cognitive domains (i.e., attention, processing, executive function, memory) in seniors. Most conclusive data are obtained from studies with dementia or cognitive impairment. Confident detection of exercise training effects requires adequate between-day reliability and low day-to-day variability obtained from acute studies, respectively. These absolute and relative reliability measures have not yet been examined for a single aerobic training session in seniors...
October 25, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/29068603/differences-in-echocardiography-blood-pressure-stroke-volume-maximal-power-and-profile-of-genes-related-to-cardiac-hypertrophy-in-elite-road-cyclists
#17
Grażyna Janikowska, Aleksandra Żebrowska, Aleksandra Kochańska-Dziurowicz, Urszula Mazurek
BACKGROUND: Regular and moderate exercise is beneficial for improving the efficiency of the heart, but high-intensity physical activity may result in cardiac changes. OBJECTIVES: This study focuses on the identification of the differences in echocardiography and blood variables before exercise, as well as the genes associated with cardiac hypertrophy at rest and in response to graded exercise test. MATERIAL AND METHODS: The study group was made up of 28 road cyclists...
September 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29064824/uncoupling-vor-and-vestibuloautonomic-retention-to-coriolis-acceleration-training-in-student-pilots-and-control-subjects
#18
Linjie Wang, Yi Cao, Cheng Tan, Qi Zhao, Siyang He, Dongbin Niu, Guohua Tang, Peng Zou, Lei Xing
PURPOSE: Explore the different vestibular physiologic response retention patterns after Coriolis acceleration training in student pilots and extend the results for use with Chinese astronauts in the future. METHODS: Twelve healthy control male subjects were screened from males familiar with vestibular training and who physically resembled the astronauts. Fourteen student pilots were selected from 23 participants by rotational vestibular function tests. All subjects were exposed to five-day continuous or intermittent Coriolis acceleration training...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29064292/psychophysiological-response-and-fine-motor-skills-in-high-altitude-parachute-jumps
#19
Vicente Javier Clemente-Suárez, José Juan Robles-Pérez, Ketty Herrera-Mendoza, Beliña Herrera-Tapias, Jesús Fernández-Lucas
Clemente-Suárez, Vicente Javier, José Juan Robles-Pérez, Ketty Herrera-Mendoza, Beliña Herrera-Tapias, and Jesús Fernández-Lucas. Psychophysiological response and fine motor skills in high-altitude parachute jumps. High Alt Med Biol 00:000-000, 2017.-We analyzed the psychophysiological response and specific fine motor skill of an experienced jumper in HALO (high altitude low opening) and HAHO (high altitude high opening) parachute jumps. Eight HALO and eight HAHO jumpers were analyzed. They jumped at 5500 m, HALO jumpers opened the parachute at 500 m and HAHO jumpers at 4300 m of altitude...
October 24, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29060794/modified-automatic-r-peak-detection-algorithm-for-patients-with-epilepsy-using-a-portable-electrocardiogram-recorder
#20
J Jeppesen, S Beniczky, A Fuglsang Frederiksen, P Sidenius, P Johansen
Earlier studies have shown that short term heart rate variability (HRV) analysis of ECG seems promising for detection of epileptic seizures. A precise and accurate automatic R-peak detection algorithm is a necessity in a real-time, continuous measurement of HRV, in a portable ECG device. We used the portable CE marked ePatch® heart monitor to record the ECG of 14 patients, who were enrolled in the videoEEG long term monitoring unit for clinical workup of epilepsy. Recordings of the first 7 patients were used as training set of data for the R-peak detection algorithm and the recordings of the last 7 patients (467...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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