Read by QxMD icon Read

heart rate variability and exercise

Filipe Fernandes Stoyell-Conti, Fernando Santos, Jacqueline Freire Machi, Diana Rosa Hernandez, Catarina Andrade Barboza, Maria-Cláudia Irigoyen, Kátia De Angelis, Mariana Morris
Aim: We employed an echocardiographic (ECHO) system as the backbone for the collection of electrocardiogram (ECG) and heart rate variability (HRV) data. The system was tested using an exercise model in which C57 male mice were exposed to sham or forced wheel running. Methods: Peak/peak (RR) interval was recorded over a 3 min period using the ECG platform of the ECHO system. Isoflurane-anesthetized male mice were divided into two groups ( n = 8/group): sedentary (S) and forced wheel trained (T)...
April 2018: Journal of Cardiovascular Echography
Breno Q Farah, Antônio H Germano-Soares, Sergio Luiz C Rodrigues, Camila X Santos, Sávio S Barbosa, Lauro C Vianna, Véronique A Cornelissen, Raphael M Ritti-Dias
The aim of this study was to describe, through a systematic review, the acute and chronic effects of isometric handgrip exercise on cardiovascular variables in hypertensive individuals. In this systematic review, we included studies that analyzed whether a single bout or a program with isometric exercises affect cardiovascular variables in hypertensive adults. The electronic database PubMed/Medline was searched for relevant studies published until May 2017. Of the 2927 studies initially identified, 2916 were excluded based on title and abstract and five on the basis of full-text assessment, leaving six studies remaining...
August 1, 2017: Sports
Mark R Noon, Rob S James, Neil D Clarke, Richard J Taylor, C Douglas Thake
The aim of this study was to determine the sensitivity of selected subjective and objective monitoring assessments in detecting changes in group and individual responses to low and high load bouts of high intensity intermittent exercise. In a counterbalanced crossover design, Thirteen Academy Rugby Union players (mean ± SD: age: 18 ± 1 years) performed a low load (15 min) and a high load (90 min) bout of high intensity intermittent exercise (Loughborough Intermittent Shuttle Test) one week apart. Monitoring assessments were performed immediately prior to and 20 h following each trial...
June 15, 2018: Sports
Sebastian Ludyga, Uwe Pühse, Stefano Lucchi, Jonas Marti, Markus Gerber
OBJECTIVES: To examine the immediate and sustained effects of intermittent exercise sessions at different intensities on inhibitory control and task-related heart rate variability (HRV) in adolescents. DESIGN: Using cluster-randomization, participants from six classes (n=94) were allocated to groups performing 20min of intermittent exercise at moderate (MIE) or high intensity (HIE) and a control group (CON). METHODS: Using a computer-based Flanker task, inhibitory control was assessed in a classroom setting prior to and following exercise as well as 30 and 60min after exercise cessation...
June 5, 2018: Journal of Science and Medicine in Sport
Andrius Rapalis, Andrius Petrėnas, Monika Šimaitytė, Raquel Bailón, Vaidotas Marozas
OBJECTIVE: The growing interest to integrate consumer smart wristbands in eHealth applications spawns the need for novel approaches of data parametrization which account for the technology-specific constraints. The present study aims to investigate the feasibility of a consumer smart wristband to be used for computing pulse rate parameters during free-living activities. APPROACH: The feasibility of computing pulse rate variability (PRV) as well as pulse rate and physical activity-related parameters using the smart wristband was investigated, having an electrocardiogram as a reference...
May 31, 2018: Physiological Measurement
Fabrizio Taffoni, Diego Rivera, Angelica La Camera, Andrea Nicolò, Juan Ramón Velasco, Carlo Massaroni
Over the last decades, wearable systems have gained interest for monitoring of physiological variables, promoting health, and improving exercise adherence in different populations ranging from elite athletes to patients. In this paper, we present a wearable system for the continuous real-time monitoring of respiratory frequency ( f R ), heart rate (HR), and movement cadence during physical activity. The system has been experimentally tested in the laboratory (by simulating the breathing pattern with a mechanical ventilator) and by collecting data from one healthy volunteer...
2018: Journal of Healthcare Engineering
Thomas L Andre, Joshua J Gann, Paul S Hwang, Emily Ziperman, Marshall J Magnussen, Darryn S Willoughby
Andre, TL, Gann, JJ, Hwang, PS, Ziperman, E, Magnussen, MJ, and Willoughby, DS. Restrictive breathing mask reduces repetitions to failure during a session of lower-body resistance exercise. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to determine the effect of restrictive breathing mask (RBM) on muscle performance, hemodynamic, and perceived stress variables during a session of lower-body resistance exercise. In a crossover design, 10 participants performed 2 separate testing sessions, RBM and no mask, consisting of squat, leg press, and leg extension...
May 25, 2018: Journal of Strength and Conditioning Research
Gary McEwan, Rosemary Arthur, Shaun M Phillips, Neil V Gibson, Chris Easton
This study (1) compared the physiological responses and performance during a high-intensity interval training (HIIT) session incorporating externally regulated (ER) and self-selected (SS) recovery periods and (2) examined the psychophysiological cues underpinning SS recovery durations. Following an incremental maximal exercise test to determine maximal aerobic speed (MAS), 14 recreationally active males completed 2 HIIT sessions on a non-motorised treadmill. Participants performed 12 × 30 s running intervals at a target intensity of 105% MAS interspersed with 30 s (ER) or SS recovery periods...
May 29, 2018: European Journal of Sport Science
Alejandro Javaloyes, Jose Manuel Sarabia, Robert Patrick Lamberts, Manuel Moya-Ramon
PURPOSE: Road cycling is a sport with extreme physiological demands. Therefore, there is a need to find new strategies to improve performance. Heart rate variability (HRV) has been suggested as an effective alternative for prescribing training load against predefined training programs. The purpose of this study is to examine the effect of training prescription based on HRV in road cycling performance. METHODS: Seventeen well-trained cyclists participated in this study...
May 29, 2018: International Journal of Sports Physiology and Performance
Chun-Yi Lin, Tze-Taur Wei, Chen-Chen Wang, Wan-Chen Chen, Yu-Min Wang, Song-Yen Tsai
Qigong is a gentle exercise that promotes health and well-being. This study evaluated the acute physiological and psychological effects of one session of qigong exercise in older practitioners. A total of 45 participants (mean age, 65.14 years) were recruited. Meridian electrical conductance, State-Trait Anxiety Inventory (STAI), heart rate variability (HRV), and Short Form 36 (SF-36) were evaluated and compared before and after one session of qigong exercise. The results revealed that the electrical conductance of all meridians, except spleen and bladder meridians, increased significantly ( p < 0...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
Matthew J Garver, Cory M Scheadler, Logan M Smith, Sarah J Taylor, Chase M Harbach
Acclimatization to altitude has been shown to improve elements of performance. Use of simulated altitude is popular among athletes across the sports spectrum. This work was on a handheld, re-breathing device touted to enhance performance. Seven recreationally-trained athletes used the device for 18 hours over the course of the 37-day intervention trial. The elevations simulated were progressively increased from 1,524m to 6,096m. To ascertain potential efficacy, four performance trials were included (familiarization, baseline, and 2 follow-ups)...
2018: International Journal of Exercise Science
Sandro Lemos, Tiago Figueiredo, Silvio Marques, Thalita Leite, Diogo Cardozo, Jeffrey M Willardson, Roberto Simão
This study compared the effect of a strength training session performed at different exercise orders and rest intervals on blood pressure and heart rate variability (HRV). Fifteen trained men performed different upper body exercise sequences [large to small muscle mass (SEQA) and small to large muscle mass (SEQB)] in randomized order with rest intervals between sets and exercises of 40 or 90 seconds. Fifteen repetition maximum loads were tested to control the training intensity and the total volume load. The results showed, significant reductions for systolic blood pressure (SBP) for all sequences compared to baseline and, post-exercise: SEQA90 at 20, 30, 40, 50 and 60 minutes; SEQA40 and SEQB40 at 20 minutes and SEQB90 at 10, 20, 30, 40, 50 and 60 minutes...
2018: International Journal of Exercise Science
Moisés M Picón, Iván M Chulvi, Juan-Manuel T Cortell, Juan Tortosa, Yasser Alkhadar, José Sanchís, Gilberto Laurentino
Different types of exercise might produce reductions in blood pressure (BP). One physiological mechanism that could explain the lowering adaptation effect on BP after an exercise program is an improved in baroreflex control of muscle sympathetic nerve activity. Consequently, exploring the different methods of training and their post-exercise hypotension (PEH) becomes of interest for healthcare providers. Recently, it has been suggested that blood flow restriction training (BFR) can generate PEH. The aim of this study was to determine the acute response on cardiovascular variables after low intensity resistance training with BFR in normotensive subjects...
2018: International Journal of Exercise Science
Shalini Verma, Jamal Ali Moiz, Shahnawaz Anwer, Ahmad H Alghadir, Mohammed Ejaz Hussain
BACKGROUND: Cardiac autonomic neuropathy is a commonly overlooked complication of type 2 diabetes mellitus (T2DM) characterized by an imbalance between sympathetic and parasympathetic supply to the heart, which contributes to cardiovascular morbidity and mortality. T2DM has also been shown to negatively influence oxygen kinetics and increase oxidative stress, which may be linked to the development of various chronic complications. Aerobic training has been reported to improve oxygen uptake, antioxidant defense, and cardiac autonomic function in T2DM; however, the effects of varying doses of exercise on these variables are not known...
May 24, 2018: Trials
S Magno, G Ceccarini, C Pelosini, R Jaccheri, J Vitti, P Fierabracci, G Salvetti, G Airoldi, M Minale, G Saponati, F Santini
BACKGROUND: Hypercholesterolemia is a major risk factor for cardiovascular disorders and requires specific intervention through an adequate lifestyle (diet and physical exercise) and, if necessary, an appropriate drug treatment. Lipid-lowering drugs, although generally efficacious, may sometimes cause adverse events. A growing attention has been devoted to the correction of dyslipidemias through the use of dietary supplements. The aim of this study was to assess the lipid-lowering activity and safety of a dietary supplement containing monacolin K, L-arginine, coenzyme Q10 and ascorbic acid, named Argicolina (A), compared to a commercially available product containing monacolin K and coenzyme Q10, Normolip 5 (N)...
May 24, 2018: Lipids in Health and Disease
G P T Arêas, F C R Caruso, R P Simões, V Castello-Simões, R B Jaenisch, T O Sato, R Cabiddu, R Mendes, R Arena, A Borghi-Silva
Despite the appeal of ultra-short-term heart rate variability (HRV) methods of analysis applied in the clinical and research settings, the number of studies that have investigated HRV by analyzing R-R interval (RRi) recordings shorter than 5 min is still limited. Moreover, ultra-short-term HRV analysis has not been extensively validated during exercise and, currently, no indications exist for its applicability during resistance exercise. The aim of the present study was to compare ultra-short-term HRV analysis with standard short-term HRV analysis during low-intensity, dynamic, lower limb resistance exercise in healthy elderly subjects...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
Franciele M Vanderlei, Fernando Zandonadi, Fabiano Franciso de Lima, Bruna S A Silva, Ana Paula C F Freire, Dionei Ramos, Ercy Mara C Ramos
BACKGROUND: An exercise modality that has been gaining significant importance in the rehabilitation of subjects with COPD is resistance training. When considering that patients with COPD present alterations in autonomic cardiac modulation caused by the disease itself, it is necessary to investigate the behavior of the autonomic nervous system in relation to this type of exercise. Thus, the objective of this study was to compare the acute effects of resistance training with elastic tubes, elastic bands, and conventional weightlifitng on the behavior of cardiac autonomic modulation in post-exercise recovery in subjects with COPD...
May 22, 2018: Respiratory Care
Rita McGuire, Julie Honaker, Bunny Pozehl, Melody Hertzog
PURPOSE: The aim of this pilot study was to evaluate the effect of a multicomponent balance and resistance training intervention on physical function, balance, and falls in older (≥65 years) community-dwelling heart failure (HF) patients. DESIGN: Randomized, two-group repeated-measures experimental design. METHODS: The intervention involved once weekly supervised group sessions with home sessions encouraged twice weekly. Focus groups held pre/post intervention...
May 19, 2018: Rehabilitation Nursing: the Official Journal of the Association of Rehabilitation Nurses
Gleisson da Silva Araujo, David G Behm, Estêvão Rios Monteiro, Aline Gomes Ferreira de Melo Fiuza, Thiago Matassoli Gomes, Jefferson Macedo Vianna, Michel Silva Reis, Jefferson da Silva Novaes
da Silva Araujo, G, Behm, DG, Monteiro, ER, de Melo Fiuza, AGF, Gomes, TM, Vianna, JM, Reis, MS, and da Silva Novaes, J. Order effects of resistance and stretching exercises on heart rate variability and blood pressure in healthy adults. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to compare the acute effect of different combinations and order of resistance exercise (RE) and stretching exercise (SE) on heart rate variability, systolic blood pressure (SBP), and diastolic blood pressure (DBP)...
May 17, 2018: Journal of Strength and Conditioning Research
Prem Bhattarai, Bishnu H Paudel, Dilip Thakur, Balkrishna Bhattarai, Bijay Subedi, Rita Khadka
Background: Despite the successful adaptation to high altitude, some differences do occur due to long term exposure to the hypoxic environment. The effect of long term high altitude exposure on cardiac autonomic adjustment during basal and post-exercise recovery is less known. Thus we aimed to study the differences in basal cardiac autonomic adjustment and its response to exercise in highlanders and to compare it with lowlanders. Methods: The study was conducted on 29 healthy highlander males who were born and brought up at altitude of 3000 m and above from the sea level, their cardiac autonomic adjustment was compared with age, sex, physical activity and ethnicity-matched 29 healthy lowlanders using Heart Rate Variability (HRV) during rest and recovery from sub-maximal exercise (3 m step test)...
2018: Annals of Occupational and Environmental Medicine
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"