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Heart rate variability, training

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https://www.readbyqxmd.com/read/28222576/may-a-unitary-autonomic-index-help-assess-autonomic-cardiac-regulation-in-elite-athletes-preliminary-observations-on-the-national-italian-olympic-committee-team
#1
Roberto Sala, Mara Malacarne, Fabio Tosi, Manuela Benzi, Nadia Solaro, Stefano Tamorri, Antonio Spataro, Massimo Pagani, Daniela Lucini
BACKGROUND: Long term endurance training, as occurring in elite athletes, is associated to cardiac neural remodeling in favor of cardioprotective vagal mechanisms, resulting in resting bradycardia and augmented contribution of cardiac parasympathetic nerve activity. Autonomic assessment can be performed by way of Heart Rate Variability. This technique however provides multiple indices, and there is not yet complete agreement on their specific significance. Purpose of the study was to assess whether a rank transformation and radar plot could provide a unitary autonomic index, capable to show a correlation between intensity of individual work and quality of autonomic regulation...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28219941/ithlete-heart-rate-variability-app-knowing-when-to-train
#2
Lucía Sagarra-Romero, Mercedes Ruidiaz Peña, Antonio Monroy Antón, Santiago Calero Morales
No abstract text is available yet for this article.
February 20, 2017: British Journal of Sports Medicine
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
#3
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/28192512/explosive-strength-and-endurance-adaptations-in-young-elite-soccer-players-during-two-soccer-seasons
#4
Riccardo Di Giminiani, Christiano Visca
The purpose of the present study was to investigate the explosive strength and endurance adaptations in young elite soccer players who underwent a supervised training program for a period of two years. Nineteen players, with seven years of training experience (age: 13.3 ± 0.1 years; body weight: 57.9 ± 4.9 kg; height: 168.9 ± 4.7 cm; BMI: 20.1 ± 1.1 kg/m2), voluntarily participated in the present study. The testing sessions were performed at the beginning of the preparation period in the first (T1), second (T2), and third year (T3)...
2017: PloS One
https://www.readbyqxmd.com/read/28188371/the-effect-of-functional-overreaching-on-parameters-of-autonomic-heart-rate-regulation
#5
Clint R Bellenger, Rebecca L Thomson, Eileen Y Robertson, Kade Davison, Maximillian J Nelson, Laura Karavirta, Jonathan D Buckley
PURPOSE: Correlations between fatigue-induced changes in performance and maximal rate of HR increase (rHRI) may be affected by differing assessment workloads. This study evaluated the effect of assessing rHRI at different workloads on performance tracking, and compared this with HR variability (HRV) and HR recovery (HRR). METHODS: Performance [5-min cycling time trial (5TT)], rHRI (at multiple workloads), HRV and HRR were assessed in 12 male cyclists following 1 week of light training (LT), 2 weeks of heavy training (HT) and a 10-day taper (T)...
February 11, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28181710/on-field-prediction-vs-monitoring-of-aerobic-capacity-markers-using-submaximal-lactate-and-heart-rate-measures
#6
Ibai Garcia-Tabar, Mikel Izquierdo, Esteban M Gorostiaga
This study aimed to validate the use of a single blood lactate concentration measurement taken following a 5-min running bout at 10 km·h(-1) (BLC10 ) and the speed associated with 90% of maximal heart rate (S90 ) to predict and monitor fixed blood lactate concentration (FBLC) thresholds in athletes. Three complementary studies were undertaken. Study-I: A cross-sectional study examining the associations of BLC10 and S90 with running speeds at FBLC of 3 (S3mM) and 4 mmol·L(-1) (S4mM) in 100 athletes. Study-II: A cross-validation study assessing the predictive capacity of BLC10 and S90 to estimate FBLC thresholds in real practice...
February 9, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28181041/neurobiological-stress-responses-predict-aggression-in-boys-with-oppositional-defiant-disorder-conduct-disorder-a-1-year-follow-up-intervention-study
#7
Jantiene Schoorl, Sophie van Rijn, Minet de Wied, Stephanie H M van Goozen, Hanna Swaab
To improve outcome for children with antisocial and aggressive behavior, it is important to know which individual characteristics contribute to reductions in problem behavior. The predictive value of a parent training (Parent Management Training Oregon; PMTO), parenting practices (monitoring, discipline, and punishment), and child neurobiological function (heart rate, cortisol) on the course of aggression was investigated. 64 boys with oppositional defiant disorder or conduct disorder (8-12 years) participated; parents of 22 boys took part in PMTO...
February 8, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28177746/preliminary-safety-analysis-of-high-intensity-interval-training-hiit-in-persons-with-chronic-stroke
#8
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/28164771/a-role-of-the-parasympathetic-nervous-system-in-cognitive-training
#9
Feng Lin, Kathi L Heffner, Ping Ren, Duje Tadin
BACKGROUND: Vision-based speed of processing (VSOP) training can result in broad cognitive improvements in older adults with amnestic mild cognitive impairment (aMCI). What remains unknown, however, is what neurophysiological mechanisms account for the observed training effect. Much of the work in this area has focused on the central nervous system, neglecting the fact that the peripheral system can contributes to changes of the central nervous system and vice versa. OBJECTIVE: We examined the prospective relationship between an adaptive parasympathetic nervous system response to cognitive stimuli and VSOP training-induced plasticity...
February 2, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28150471/the-effect-of-4-weeks-fixed-and-mixed-intermittent-hypoxic-training-iht-on-respiratory-metabolic-and-acid-base-response-of-capillary-blood-during-submaximal-bicycle-exercise-in-male-elite-taekwondo-players
#10
Hun-Young Park, Sub Sunoo, Sang-Seok Nam
Purpose: The purpose of our study was to determine the effectiveness of 4 weeks fixed and mixed intermittent hypoxic training (IHT) and its difference from exercise training at sea-level on exercise load, respiratory metabolic and acid-base response of capillary blood during 80% maximal heart rate (HRmax) bicycle exercise in male elite Taekwondo players. Methods: Male elite Taekwondo players (n = 25 out of 33) were randomly assigned to training at sea-level (n = 8, control group), training at 16...
December 31, 2016: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28149380/effect-of-the-pitch-size-and-presence-of-goalkeepers-on-the-work-load-of-players-during-small-sided-soccer-games
#11
Karel Hulka, Radim Weisser, Jan Belka
Small-sided games (SSGs) are spontaneous forms of specific training where exercise intensity can be manipulated by modifying external factors. To ensure suitable usage of small-sided games in practice, we have to know which variables can influence internal responses and external loads. The aim of the present study was to determine the influence of presence of a goalkeeper and the pitch size on internal responses and the external load during five-a-side soccer games. Twenty nine junior soccer players (age: 18...
June 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28140647/effects-of-maintaining-different-exercise-intensities-during-detraining-on-aerobic-capacity-in-thoroughbreds
#12
Kazutaka Mukai, Atsushi Hiraga, Toshiyuki Takahashi, Akira Matsui, Hajime Ohmura, Hiroko Aida, James H Jones
OBJECTIVE To determine whether racehorses undergoing regular exercise at 2 intensities or stall rest during a period of reduced training (detraining) would differentially maintain their cardiopulmonary and oxygen-transport capacities. ANIMALS 27 Thoroughbreds. PROCEDURES Horses trained on a treadmill for 18 weeks underwent a period of detraining for 12 weeks according to 1 of 3 protocols: cantering at 70% of maximal rate of oxygen consumption ([Formula: see text]o2max) for 3 min/d for 5 d/wk (canter group); walking for 1 h/d for 5 d/wk (walk group); or stall rest (stall group)...
February 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28134506/effect-of-exercise-training-and-detraining-in-autonomic-modulation-and-cardiorespiratory-fitness-in-breast-cancer-survivors
#13
Andréa D Reis, João B Silva Garcia, Renata R Diniz, Antonio C Silva-Filho, Carlos J Dias, Richard D Leite, Cristiano Mostarda
BACKGROUNDː Breast cancer is one of the leading causes of death worldwide. Heart rate variability has attracted scientific community attention in different pathologies, becoming thus an ultimate importance tool in both clinical and research setting, being a good predictor of cardiac events and mortality risk and also used in physical exercise and sports in general. The aim of the present study was to evaluate 12 weeks of exercise training and six weeks of detraining in cardiorespiratory capacity, and autonomic modulation in breast cancer patients...
January 30, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28132741/respiratory-muscle-training-improves-chemoreflex-response-heart-rate-variability-and-respiratory-mechanics-in-rats-with-heart-failure
#14
Rodrigo B Jaenisch, Edson Quagliotto, Chalyne Chechi, Leonardo Calegari, Fernando Dos Santos, Audrey Borghi-Silva, Pedro Dal Lago
BACKGROUND: The aim of the present report was to evaluate respiratory muscle training (RMT) effects on hemodynamic function, chemoreflex response, heart rate variability, and respiratory mechanics in rats with heart failure (HF rats). METHODS: Wistar rats were divided into 4 groups: sedentary-sham (Sed-Sham, n = 8), respiratory muscle trained-sham (RMT-Sham, n = 8), sedentary-HF (Sed-HF, n = 8) and respiratory muscle trained-HF (RMT-HF, n = 8). Animals were submitted to an RMT protocol performed 30 minutes per day, 5 days per week for 6 weeks, whereas the sedentary animals did not exercise...
November 11, 2016: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28131974/autonomic-cardiac-regulation-blood-pressure-and-cardiorespiratory-fitness-responses-to-different-training-doses-over-a-12-week-group-program-in-the-elderly
#15
A J McKune, B Peters, S S Ramklass, J van Heerden, C Roberts, J Krejčí, M Botek
AIM: The study assessed the effects of different weekly training frequencies performed over a 12 week exercise programme (strength, endurance, balance) on autonomic cardiac activity, blood pressure and cardiorespiratory fitness (CRF) in elderly individuals. METHODS: Fifty-eight individuals participated in the study: 2TG (N=24, 71.1±6.4 yrs; 19 females, 5 males) performing two, 60min sessions/week; and 3TG (N=34, 72.3±7.9 yrs; 25 females, 9 males) performing three, 60min sessions/week...
January 20, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28131566/functional-outcome-in-chronic-heart-failure-after-exercise-training-possible-predictive-value-of-heart-rate-variability
#16
Roberto Ricca-Mallada, Edurado R Migliaro, Gabriela Silvera, Lilian Chiappella, Rossana Frattini, Federico Ferrando-Castagnetto
BACKGROUND: Controlled exercise training (ET) is a valuable therapeutic addition to pharmacological treatment in most patients with chronic heart failure (CHF), reducing long-term mortality, preventing cardiac remodelling and improving functional capacity. Despite the fact that the mechanism underlying its benefits might be multifactorial, a sustained improvement in autonomic balance is usually attributed as a major effect. Nevertheless, not all eligible subjects show the same response to ET, probably due to several differences in the subpopulations enrolled...
January 25, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28128646/effects-of-yoga-versus-hydrotherapy-training-on-health-related-quality-of-life-and-exercise-capacity-in-patients-with-heart-failure-a-randomized-controlled-study
#17
Ewa Hägglund, Inger Hagerman, Kerstin Dencker, Anna Strömberg
AIMS: The aims of this study were to determine whether yoga and hydrotherapy training had an equal effect on the health-related quality of life in patients with heart failure and to compare the effects on exercise capacity, clinical outcomes, and symptoms of anxiety and depression between and within the two groups. METHODS: The design was a randomized controlled non-inferiority study. A total of 40 patients, 30% women (mean±SD age 64.9±8.9 years) with heart failure were randomized to an intervention of 12 weeks, either performing yoga or training with hydrotherapy for 45-60 minutes twice a week...
January 1, 2017: European Journal of Cardiovascular Nursing
https://www.readbyqxmd.com/read/28113791/a-robust-motion-artifact-detection-algorithm-for-accurate-detection-of-heart-rates-from-photoplethysmographic-signals-using-time-frequency-spectral-features
#18
Duy Dao, S M A Salehizadeh, Yeon Noj, Jo Woon Chong, Chae Cho, Dave Mcmanus, Chad E Darling, Yitzhak Mendelson, Ki H Chon
Motion and noise artifacts (MNAs) impose limits on the usability of the photoplethysmogram (PPG), particularly in the context of ambulatory monitoring. MNAs can distort PPG, causing erroneous estimation of physiological parameters such as heart rate (HR) and arterial oxygen saturation (SpO2). In this study we present a novel approach, "TifMA," based on using the Time-frequency spectrum of PPG to first detect the MNA-corrupted data and next discard the non-usable part of the corrupted data. The term "non-usable" refers to segments of PPG data from which the HR signal cannot be recovered accurately...
October 21, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28113529/quality-assessment-of-ambulatory-ecg-using-wavelet-entropy-of-the-hrv-signal
#19
Christina Orphanidou, Ivana Drobnjak
Data in recordings obtained from ambulatory patients using wearable sensors are often corrupted by motion artefact and are, in general noisier, than data obtained from non-mobile patients. Identifying and ignoring erroneous measurements from these data is very important, if wearable sensors are to be incorporated into clinical practice. In this paper we propose a novel Signal Quality Index (SQI), intended to assess whether reliable heart rates (HR) can be obtained from a single channel of ECG collected from ambulatory patients, using wearable sensors...
October 5, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28113282/on-the-influence-of-heart-rate-and-coupling-interval-prematurity-on-heart-rate-turbulence
#20
Oscar Barquero-Perez, Carlos Figuera, Rebeca Goya-Esteban, Inmaculada Mora-Jimenez, Francisco Javier Gimeno-Blanes, Pablo Laguna, Juan Pablo Martinez Cortes, Eduardo Gil, Leif Sornmo, Arcadi Garcia-Alberola, Jose Luis Rojo-Alvarez
OBJECTIVE: Heart rate turbulence (HRT) has been successfully explored for cardiac risk stratification. While HRT is known to be influenced by the heart rate (HR) and the coupling interval (CI), non-concordant results have been reported on how the CI influences HRT. The purpose of this study is to investigate HRT changes in terms of CI and HR by means of a specially designed protocol. METHODS: A dataset was acquired from 11 patients with structurally normal hearts for which CI was altered by different pacing trains and HR by isoproterenol during electrophysiological study (EPS)...
April 15, 2016: IEEE Transactions on Bio-medical Engineering
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