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https://www.readbyqxmd.com/read/28737294/a-call-to-action-towards-an-evidence-based-approach-to-using-verbal-encouragement-during-maximal-exercise-testing
#1
REVIEW
Adrian W Midgley, David C Marchant, Andrew R Levy
By definition, maximal exercise testing inherently requires participants to give a maximal effort. This is an important practical issue as submaximal efforts can produce invalid test results. Verbal encouragement is commonly used to motivate participants to maintain or increase effort investment during maximal exercise testing. Accordingly, studies have reported significant increases in time to exhaustion of between 8% and 18% during VO2max and multistage shuttle run tests, and a significant 30·5 m mean increase in 6-min walk test distance...
July 24, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28727673/exercise-training-improves-ventilatory-efficiency-in-patients-with-a-small-abdominal-aortic-aneurysm-a-randomized-controlled-study
#2
Ricardo M Lima, Baruch Vainshelboim, Rucha Ganatra, Ronald Dalman, Khin Chan, Jonathan Myers
PURPOSE: To investigate the effects of exercise training on ventilatory efficiency and physiological responses to submaximal exercise in subjects with small abdominal aortic aneurysm (AAA). METHODS: Sixty-five male patients (72.3 ± 7.0 years) were randomized to exercise training (n = 33) or usual care group (n = 32). Exercise subjects participated in a training groups for 3 mo. Cardiopulmonary exercise testing was performed before and after the study period and peak VO2, the ventilatory threshold (VT), the oxygen uptake efficiency slope (OUES), and the VE2/VCO2 slope were identified...
July 19, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28727672/cardiac-rehabilitation-in-patients-with-left-ventricular-assist-device-a-systematic-review-and-meta-analysis
#3
Toufik Mahfood Haddad, Alok Saurav, Aiman Smer, Muhammad S Azzouz, Abhilash Akinapelli, Mark A Williams, Venkata M Alla
PURPOSE: Exercise-based cardiac rehabilitation (EBCR) has been demonstrated to improve functional capacity in heart failure (HF). However, there are limited data on the effect of EBCR in patients with advanced HF and left ventricular assist devices (LVADs). This meta-analysis sought to evaluate the effects of EBCR on functional capacity in patients with LVAD. METHODS: PubMed, Web of Science, CINAHL, and Cochrane Library databases were searched for randomized studies assessing the impact of EBCR in patients following LVAD implantation compared with standard therapy (ST)...
July 19, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28723095/facile-and-low-temperature-fabrication-of-thermochromic-cr2o3-vo2-smart-coatings-enhanced-solar-modulation-ability-high-luminous-transmittance-and-uv-shielding-function
#4
Tianci Chang, Xun Cao, Ning Li, Shiwei Long, Xiang Gao, Liv R Dedon, Guangyao Sun, Hongjie Luo, Ping Jin
In the pursuit of energy efficient materials, vanadium dioxide (VO2) based smart coatings have gained much attention in recent years. For smart window applications, VO2 thin films should be fabricated at low temperature to reduce the cost in commercial fabrication and solve compatibility problems. Meanwhile, thermochromic performance with high luminous transmittance and solar modulation ability as well as effective UV shielding function has become the most important developing strategy for ideal smart windows...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28707733/a-new-equation%C3%A2-to-predict-peak-vo2-in-obese-patients-during-cardiopulmonary-exercise-testing
#5
Alan Carlos Brisola Barbosa, Evandro Fornias Sperandio, Bárbara de Barros Gonze, Giovanna Domingues Spina, Rodolfo Leite Arantes, Antônio Ricardo de Toledo Gagliardi, Marcello Romiti, Victor Zuniga Dourado
We aimed to develop an equation to predict peak VO2 in obese subjects undergoing CPET. In addition, we evaluated and compared three published equations. We randomized 346 obese subjects undergoing CPET into a group for developing the equation (n = 272) and a group for cross-validation (n = 74), compared through the Bland and Altman method. Height, sex and age were responsible for 85·5% of total variability of the peak VO2. Additional 1% and 0·7% of the variability were, respectively, explained by physical inactivity and diabetes...
July 14, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28706467/ketogenic-diet-benefits-body-composition-and-well-being-but-not-performance-in-a-pilot-case-study-of-new-zealand-endurance-athletes
#6
Caryn Zinn, Matthew Wood, Mikki Williden, Simon Chatterton, Ed Maunder
BACKGROUND: Low-carbohydrate, high-fat and ketogenic diets are increasingly adopted by athletes for body composition and sports performance enhancements. However, as yet, there is no consensus on their efficacy in improving performance. There is also no comprehensive literature on athletes' experiences while undertaking this diet. The purpose of this pilot work was two-fold: i. to examine the effects of a non-calorie controlled ketogenic diet on body composition and performance outcomes of endurance athletes, and ii...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28701470/effect-of-ferric-carboxymaltose-on-exercise-capacity-in-patients-with-chronic-heart-failure-and-iron-deficiency
#7
Dirk J van Veldhuisen, Piotr Ponikowski, Peter van der Meer, Marco Metra, Michael Böhm, Artem Doletsky, Adriaan A Voors, Iain C Macdougall, Stefan D Anker, Bernard Roubert, Lorraine Zakin, Alain Cohen-Solal
Background -Iron deficiency is common in patients with heart failure (HF), and is associated with reduced exercise capacity and poor outcomes. Whether correction of iron deficiency with (intravenous) ferric carboxymaltose (FCM) affects peak oxygen consumption [peak VO2], an objective measure of exercise intolerance in HF, has not been examined. Methods -We studied patients with systolic HF (left ventricular ejection fraction [LVEF] ≤45%) and mild to moderate symptoms despite optimal HF medication, Patients were randomized 1:1 to treatment with FCM for 24 weeks or standard of care...
July 12, 2017: Circulation
https://www.readbyqxmd.com/read/28697553/impact-of-training-volume-and-intensity-on-rbc-nos-no-pathway-and-endurance-capacity
#8
Christina Koliamitra, Bastian Holtkamp, Philipp Zimmer, Wilhelm Bloch, Marijke Grau
BACKGROUND: Acute exercise increases red blood cell-nitric oxide synthase (RBC-NOS) activation and RBC deformability but the effect of regular training remains unclear. OBJECTIVE: To detect the chronic effect of enduring moderate and high intensity training on the RBC-NOS/NO pathway and to detect a relation between RBC deformability and endurance capacity. METHODS: 38 healthy male subjects were randomly assigned to one of three training groups: High Volume Training (HVT; 120-140 beats per minute (bpm)), High Intensity Training (HIT; 160-180 bpm) and Moderate Intensity Training (MIT; 140-160 bpm)...
July 3, 2017: Biorheology
https://www.readbyqxmd.com/read/28695558/rehabilitation-in-patients-with-pulmonary-arterial-hypertension
#9
Stephan Keusch, Alexander Turk, Stéphanie Saxer, Nicola Ehlken, Ekkehard Grunig, Silvia Ulrich, On Behalf Of The Swiss Society Of Pulmonary Hypertension
Exertional dyspnoea is a leading symptom in patients with pulmonary arterial hypertension (PAH). Patients suffering from PAH report poor quality of life, have skeletal muscle dysfunction and in the absence of advanced medical therapy deteriorate progressively due to right heart failure which can lead to death. For decades, patients with PAH were advised to avoid exercise in fear of exacerbated right heart failure. Recently, it has been shown that a highly supervised rehabilitation programme in expert centres leads to significant improvements in symptoms, quality of life, exercise capacity and may even enhance haemodynamics in selected stable patients treated with advanced regimens of PAH-targeted drugs...
July 11, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28685426/effects-of-8-weeks-training-on-systemic-and-muscle-oxygen-dynamics-in-university-rugby-players
#10
Shun Takagi, Ryotaro Kime, Masatsugu Niwayama, Kuniaki Hirayama, Shizuo Sakamoto
The aim of this study was to investigate the effects of 8 weeks of training on O2 dynamics in university rugby players. University rugby players (n = 15) participated in 5 strength training sessions and 4 field-based training sessions per week for 8 weeks. Before and after 8-weeks' training, the subjects performed ramp cycling exercise until exhaustion. Muscle O2 saturation (SmO2), relative changes from rest in deoxygenated hemoglobin concentration (∆Deoxy-Hb) and total hemoglobin concentration, cardiac output (CO), and pulmonary O2 uptake (VO2) were monitored continuously during exercise...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28685207/clinical-effects-of-long-term-cardiac-contractility-modulation-ccm-in-subjects-with-heart-failure-caused-by-left-ventricular-systolic-dysfunction
#11
D Müller, A Remppis, P Schauerte, S Schmidt-Schweda, D Burkhoff, B Rousso, D Gutterman, J Senges, G Hindricks, K-H Kuck
INTRODUCTION: Heart failure is a major cause of morbidity and mortality throughout the world. Despite advances in therapy, nearly half of patients receiving guideline-directed medical therapy remain limited by symptoms. Cardiac contractility modulation (CCM) can improve symptoms in this population, but efficacy and safety in prospective studies has been limited to 12 months of follow-up. We report on the first 2 year multi-site evaluation of CCM in patients with heart failure. METHODS: One hundred and forty-three subjects with heart failure and reduced ejection fraction were followed via clinical registry for 24 months recording NYHA class, MLWHFQ score, 6 min walk distance, LVEF, and peak VO2 at baseline and 6 month intervals as clinically indicated...
July 6, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28682886/exercise-overcome-adverse-effects-among-prostate-cancer-patients-receiving-androgen-deprivation-therapy-an-update-meta-analysis
#12
REVIEW
Gao Yunfeng, He Weiyang, He Xueyang, Huang Yilong, Gou Xin
BACKGROUND: Prostate cancer (PCa) patients initiating androgen deprivation therapy (ADT) are suffering from adverse effects; exercise has been proposed as a treatment to relieve adverse effects of ADT, available meta-analysis has proved exercise improves quality of life, and therapy caused fatigue; recently, some high-quality trials have been conducted in order to get more assessment; we conduct an updated meta-analysis to evaluate feasibility that exercise relieves adverse effects in PCa patients initiating ADT...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28674605/changes-in-running-economy-respiratory-exchange-ratio-and-vo2max-in-runners-following-a-10-day-altitude-training-camp
#13
Sebastian R Diebel, Ian Newhouse, David S Thompson, Vineet B K Johnson
Running economy (RE) and VO2max are important predictors of endurance performance for elite and semi-elite endurance athletes, with RE being an appropriate predictor in a homogenous running population. Altitude training has been observed to change RE (mL.kg(-1).min(-1)), and VO2max due to alterations resulting from acclimatization. This study tracked changes in RE and VO2max before and after a 10-day altitude training camp at 1828 meters. VO2max, RE expressed calorically, and respiratory exchange ratio (RER), were measured below anaerobic threshold (AT) to observe differences between pre-and post-altitude training...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28669689/effects-of-erythropoietin-on-cycling-performance-of-well-trained-cyclists-a-double-blind-randomised-placebo-controlled-trial
#14
Jules A A C Heuberger, Joris I Rotmans, Pim Gal, Frederik E Stuurman, Juliëtte van 't Westende, Titiaan E Post, Johannes M A Daniels, Matthijs Moerland, Peter L J van Veldhoven, Marieke L de Kam, Herman Ram, Olivier de Hon, Jelle J Posthuma, Jacobus Burggraaf, Adam F Cohen
BACKGROUND: Substances that potentially enhance performance (eg, recombinant human erythropoietin [rHuEPO]) are considered doping and are therefore forbidden in sports; however, the scientific evidence behind doping is frequently weak. We aimed to determine the effects of rHuEPO treatment in well trained cyclists on maximal, submaximal, and race performance and on safety, and to present a model clinical study for doping research on other substances. METHODS: We did this double-blind, randomised, placebo-controlled trial at the Centre for Human Drug Research in Leiden (Netherlands)...
June 29, 2017: Lancet Haematology
https://www.readbyqxmd.com/read/28658082/acute-responses-to-the-7-minute-workout
#15
Michelle Riegler, Gavin Stotz, Kaitlyn Fitzgerald, Christian K Munoz, Jamie Lewis, Sebastian Ring, Todd A Astorino
A popular smartphone application called the 7 Minute Workout (7Min) claims to be scientifically proven to promote weight loss and improve cardiovascular function. The application has 10 million downloads and has been reviewed by 350,000 users. However, changes in metabolic and perceptual variables in response to 7Min are unknown. Our study compared acute responses between 7Min and a time-matched session of cycling-based high-intensity interval exercise (HIIE). Fourteen active men and women (age and VO2max = 25...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28657812/combined-prior-exercise-and-fast-start-improves-vo2-kinetics-and-cycling-performance
#16
Kirsty Brock, Prokopios Antonellis, Matthew I Black, Fred J DiMenna, Anni Vanhatalo, Andrew M Jones, Stephen J Bailey
PURPOSE: To investigate whether oxygen uptake (V̇o2) kinetics and simulated 4-km cycling performance are synergistically improved by prior 'priming' exercise and an all-out starting strategy. METHODS: Nine males completed four target work trials (114 ± 17 kJ) to assess V̇o2 kinetics and cycling performance in a repeated-measures, cross-over experimental design. Trials were initiated with either a 12-s all-out start or a self-selected start and preceded by prior severe-intensity (70%Δ) priming exercise or no priming exercise...
June 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28645496/determining-the-best-percent-predicted-equation-for-estimated-vo2-peak-by-a-1-km-moderate-perceptually-regulated-treadmill-walk-to-predict-mortality-in-outpatients-with-cardiovascular-disease
#17
Giovanni Grazzi, Gianni Mazzoni, Jonathan Myers, Luciano Codecà, Giovanni Pasanisi, Simona Mandini, Massimo Piepoli, Stefano Volpato, Francesco Conconi, Giorgio Chiaranda
OBJECTIVES: To determine the prognostic ability of established percent-predicted equations of peak oxygen consumption (%PRED) estimated by a moderate submaximal walking test in a large cohort of outpatients with cardiovascular disease (CVD). DESIGN: Population-based prospective study. METHODS: A total of 1442 male patients aged 25-85 years at baseline, underwent a moderate perceptually-regulated (11-13 on the 6-20 Borg scale) treadmill walk (1k-TWT) for peak oxygen consumption estimation (VO2 peak)...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28636515/a-brief-period-of-intensive-cardiac-rehabilitation-improves-global-longitudinal-strain-and-diastolic-function-after-a-first-uncomplicated-myocardial-infarction
#18
Gabriella Malfatto, Miriam Revera, Giovanna Branzi, Francesca Ciambellotti, Alessia Giglio, Simonetta Blengino, Matteo Oldani, Camilla Facchini, Gianfranco Parati, Mario Facchini
Objectives In patients with abnormal left ventricular ejection fraction (LVEF) after acute myocardial infarction (AMI), cardiac rehabilitation with physical training prevents cardiac remodelling. To define the role of rehabilitation in the recovery of ventricular function in less severe cases, we studied its effects on more refined indexes of left ventricular function in uncomplicated, low-risk patients. Methods and results Fifty-five patients underwent percutaneous coronary revascularization after uncomplicated first AMI...
March 21, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28636505/the-effect-of-aerobic-interval-training-and-continuous-training-on-exercise-capacity-and-its-determinants
#19
Nele Pattyn, Paul J Beckers, Véronique A Cornelissen, Ellen Coeckelberghs, Catherine De Maeyer, Geert Frederix, Kaatje Goetschalckx, Nadine Possemiers, Dirk Schepers, Emeline M Van Craenenbroeck, Kurt Wuyts, Viviane M Conraads, Luc Vanhees
Objective We aimed to investigate (1) the effects of aerobic interval training (AIT) and aerobic continuous training (ACT) on (sub)maximal exercise measures and its determinants including endothelial function, muscle strength and cardiac autonomic function, and (2) the relationship between exercise capacity and these determinants. Methods Two-hundred coronary artery disease (CAD) patients (58.4 ± 9.1 years) were randomized to AIT or ACT for 12 weeks. All patients performed a cardiopulmonary exercise test and endothelial function measurements before and after the intervention; a subpopulation underwent muscle strength and heart rate variability (HRV) assessments...
March 21, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28629628/left-ventricular-outflow-tract-obstruction-and-its-impact-on-systolic-ventricular-function-and-exercise-capacity-in-adults-with-a-subaortic-right-ventricle
#20
Annina Stauber, Céline Wey, Matthias Greutmann, Daniel Tobler, Kerstin Wustmann, Andreas Wahl, Emanuela R Valsangiacomo Buechel, Matthias Wilhelm, Markus Schwerzmann
BACKGROUND: In biventricular hearts the filling and contractility of one ventricle affects the performance of the other. In this study, we compared right ventricular systolic function and exercise capacity in patients with a subaortic right ventricle (RV) in relation to the presence of a left ventricular outflow tract obstruction (LVOTO). METHODS: Retrospective chart review of adults with congenitally corrected transposition of the great arteries (ccTGA) or with a previous atrial switch procedure for complete TGA (D-TGA)...
June 15, 2017: International Journal of Cardiology
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