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Treadmill exercise testing

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https://www.readbyqxmd.com/read/29793014/calf-muscle-oxygen-saturation-during-six-minute-walk-test-and-its-relationship-with-walking-impairment-in-symptomatic-peripheral-artery-disease
#1
Aluísio Andrade-Lima, Gabriel G Cucato, Wagner J R Domingues, Antônio H Germano-Soares, Bruno R Cavalcante, Marilia A Correia, Glauco F Saes, Nelson Wolosker, Andrew W Gardner, Antônio E Zerati, Raphael M Ritti-Dias
OBJECTIVE: Impaired microcirculation is associated with poor walking capacity in symptomatic peripheral artery disease (PAD) patients during treadmill test, however, this test does not simulate the efforts of daily walking of these patients. Thus, the aim of the study was to describe the microcirculation responses during six-minute walk test (6MWT) and to analyze the relationship between microcirculation indicators and walking impairment in symptomatic PAD patients. METHODS: Thirty-four patients were included (mean age = 67...
May 21, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29792553/mitochondrial-complex-i-defect-resulting-from-exercise-induced-lower-limb-ischemia-in-patients-with-peripheral-arterial-disease
#2
Isabelle Signolet, Pierre Abraham, Stéphanie Chupin, Myriam Ammi, Naïg Gueguen, Franck Letournel, Jean Picquet, Christophe Baufreton, Mickael Daligault, Vincent Procaccio, Pascal Reynier, Samir Henni
OBJECTIVE: This study aims to compare the structural and mitochondrial alterations between muscle segments affected by exercise-induced ischemia and segments of the same muscle without ischemia, in the same subject. METHODS: In a prospective analysis, 34 patients presenting either peripheral arterial disease or chronic coronary syndrome without any evidence of peripheral arterial disease were eligible for inclusion based on findings indicating a need for either a femoro-popliteal bypass or a saphenous harvesting for coronary bypass...
May 24, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29791970/effect-of-high-intensity-resistance-circuit-based-training-in-hypoxia-on-aerobic-performance-and-repeat-sprint-ability
#3
Domingo J Ramos-Campo, Ismael Martínez-Guardado, Guillermo Olcina, Cristian Marín-Pagán, Francisco J Martínez-Noguera, Jorge Carlos-Vivas, Pedro E Alcaraz, Jacobo A Rubio-Arias
Recent acute studies have shown that high-intensity resistance circuit-based (HRC) training in hypoxia increases metabolic stress. However, no intervention studies have yet proven their effectiveness. This study aimed to analyse the effect of 8 weeks of HRC in hypoxia on aerobic performance, resting energy expenditure (REE), repeat sprint ability (RSA) and haematological variables. Twenty-eight subjects were assigned to hypoxia (FiO2 =15%; HRChyp : n=15; age: 24.6±6.8 years; height: 177.4±5.9 cm; weight: 74...
May 23, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29791580/influence-of-aerobic-training-on-the-mechanics-of-ventricular-contraction-after-acute-myocardial-infarction-a-pilot-study
#4
Giovani Luiz De Santi, Henrique Turin Moreira, Eduardo Elias Vieira de Carvalho, Júlio César Crescêncio, André Schmidt, José Antônio Marin-Neto, Lourenço Gallo-Júnior
The study of myocardial contractility, based on the new anatomical concepts that govern cardiac mechanics, represents a promising strategy of analysis of myocardial adaptations related to physical training in the context of post-infarction. We investigated the influence of aerobic training on physical capacity and on the evaluation parameters of left ventricular contraction mechanics in patients with myocardial infarction. Thirty-one patients (55.1 ± 8.9 years) who had myocardial infarction in the anterior wall were prospectively investigated in three groups: interval training group (ITG) (n = 10), moderate training group (MTG) n = 10) and control group (CG) (n = 10)...
April 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29789801/exercise-prevents-diaphragm-wasting-induced-by-cigarette-smoke-through-modulation-of-antioxidant-genes-and-metalloproteinases
#5
Gracielle Vieira Ramos, Alessandra Choqueta de Toledo-Arruda, Clara Maria Pinheiro-Dardis, Camila Liyoko Suehiro, Thiago Luiz de Russo, Rodolfo Paula Vieira, Milton Arruda Martins, Tania Fátima Salvini, João Luiz Quagliotti Durigan
Background: The present study aimed to analyze the effects of physical training on an antioxidant canonical pathway and metalloproteinases activity in diaphragm muscle in a model of cigarette smoke-induced chronic obstructive pulmonary disease (COPD). Methods: Male mice were randomized into control, smoke, exercise, and exercise + smoke groups, which were maintained in trial period of 24 weeks. Gene expression of kelch-like ECH-associated protein 1; nuclear factor erythroid-2 like 2; and heme-oxygenase1 by polymerase chain reaction was performed...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29789302/fractional-flow-reserve-and-instantaneous-wave-free-ratio-as-predictors-of-the-placebo-controlled-response-to-percutaneous-coronary-intervention-in-stable-single-vessel-coronary-artery-disease-physiology-stratified-analysis-of-orbita
#6
Rasha Al-Lamee, James P Howard, Matthew J Shun-Shin, David Thompson, Hakim-Moulay Dehbi, Sayan Sen, Sukhjinder Nijjer, Ricardo Petraco, John Davies, Thomas Keeble, Kare Tang, Iqbal S Malik, Christopher Cook, Yousif Ahmad, Andrew S P Sharp, Robert Gerber, Christopher Baker, Raffi Kaprielian, Suneel Talwar, Ravi Assomull, Graham Cole, Niall G Keenan, Gajen Kanaganayagam, Joban Sehmi, Roland Wensel, Frank E Harrell, Jamil Mayet, Simon A Thom, Justin E Davies, Darrel P Francis
BACKGROUND : There are no data on how fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) are associated with the placebo-controlled efficacy of percutaneous coronary intervention (PCI) in stable single-vessel coronary artery disease. METHODS : We report the association between prerandomization invasive physiology within ORBITA (Objective Randomised Blinded Investigation With Optimal Medical Therapy of Angioplasty in Stable Angina), a placebo-controlled trial of patients who have stable angina with angiographically severe single-vessel coronary disease clinically eligible for PCI...
May 22, 2018: Circulation
https://www.readbyqxmd.com/read/29789265/the-physiological-and-perceptual-demands-of-running-on-a-curved-non-motorised-treadmill-implications-for-self-paced-training
#7
Patrick P J M Schoenmakers, Kate E Reed
OBJECTIVES: To compare physiological and perceptual response of running on a curved non-motorized treadmill (cNMT) with running on a motorized treadmill (MT), and to determine the running velocity at which a physiological response≥90% V˙O2 max was elicited. DESIGN & METHODS: 13 trained male runners (mean±SD; 36±11years, 1.80±0.06m, 70±4kg, V˙O2 max: 57.3±3.5 mLkg-1 min-1 ) performed an incremental running test on a MT to determine V˙O2 max and the accompanying maximum velocity (Vmax)...
May 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29786927/the-exhaled-nitric-oxide-and-mannitol-test-to-predict-exercise-induced-bronchoconstriction
#8
Kyubo Kim, Hong Je Cho, Jung Won Yoon, Sun Hee Choi, Youn Ho Sheen, ManYong Han, Heysung Baek
BACKGROUND: Exercise-induced bronchoconstriction (EIB) is diagnosed via exercise challenge on a treadmill. However, such testing requires complex equipment and sufficient healthcare resources. The fraction of exhaled nitric oxide (FeNO) test and mannitol bronchial provocation test (BPT) may serve as a surrogate of exercise testing. METHODS: We compared the diagnostic utilities of the FeNO test and mannitol BPT in predicting EIB in asthmatic children. We retrospectively analysed data from 60 asthmatic children aged 6-16 years...
May 22, 2018: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/29772387/validation-of-the-seattle-angina-questionnaire-in-women-with-ischemic-heart-disease
#9
Krishna K Patel, Suzanne V Arnold, Paul S Chan, Yuanyuan Tang, Philip G Jones, Jianping Guo, Donna M Buchanan, Mohammed Qintar, Carole Decker, David A Morrow, John A Spertus
BACKGROUND: Although the Seattle Angina Questionnaire (SAQ) has been widely used to assess disease-specific health status in patients with ischemic heart disease, it was originally developed in a predominantly male population and its validity in women has been questioned. METHODS: Using data from 8892 men and 4013 women across 2 multicenter trials and 5 registries, we assessed the construct validity, test-retest reliability, responsiveness to clinical change, and predictive validity of the SAQ Summary Score (SS) and its 5 subdomains (Physical Limitation (PL), Anginal Stability (AS), Angina Frequency (AF), Treatment Satisfaction (TS), and Quality of Life (QoL)) separately in men and women...
April 21, 2018: American Heart Journal
https://www.readbyqxmd.com/read/29765494/the-oxidant-antioxidant-equilibrium-and-inflammatory-process-indicators-after-an-exercise-test-on-the-alterg-antigravity-treadmill-in-young-amateur-female-athletes
#10
Łukasz Sielski, Paweł Sutkowy, Agnieszka Skopowska, Katarzyna Pawlak-Osińska, Zofia Augustyńska, Katarzyna Hewelt, Radosław Drapała, Alina Woźniak
The AlterG antigravity treadmill allows running with a considerable weight reduction. Physical exercise practiced on this treadmill is an innovative method supporting the treatment of injuries in sports and rehabilitation of patients. The aim of the study was to investigate the effect of a 30 min run on the AlterG treadmill with 80% body weight reduction comparing the effect to the similar effort on the classic treadmill on the redox equilibrium and the activity of selected lysosomal enzymes and a serine protease inhibitor in the blood of amateur minor female volleyball players...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29760574/seasonal-variations-in-body-composition-maximal-oxygen-uptake-and-gas-exchange-threshold-in-cross-country-skiers
#11
Metin Polat, Selcen Korkmaz Eryılmaz, Sami Aydoğan
Introduction: In order to ensure that athletes achieve their highest performance levels during competitive seasons, monitoring their long-term performance data is crucial for understanding the impact of ongoing training programs and evaluating training strategies. The present study was thus designed to investigate the variations in body composition, maximal oxygen uptake (VO2max ), and gas exchange threshold values of cross-country skiers across training phases throughout a season. Materials and methods: In total, 15 athletes who participate in international cross-country ski competitions voluntarily took part in this study...
2018: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/29751254/isometric-pre-conditioning-blunts-exercise-induced-muscle-damage-but-does-not-attenuate-changes-in-running-economy-following-downhill-running
#12
Leonardo C R Lima, Natália M Bassan, Adalgiso C Cardozo, Mauro Gonçalves, Camila C Greco, Benedito S Denadai
Running economy (RE) is impaired following unaccustomed eccentric-biased exercises that induce muscle damage. It is also known that muscle damage is reduced when maximal voluntary isometric contractions (MVIC) are performed at a long muscle length 2-4 days prior to maximal eccentric exercise with the same muscle, a phenomenon that can be described as isometric pre-conditioning (IPC). We tested the hypothesis that IPC could attenuate muscle damage and changes in RE following downhill running. Thirty untrained men were randomly assigned into experimental or control groups and ran downhill on a treadmill (-15%) for 30 min...
May 8, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29746639/branched-chain-amino-acids-are-the-primary-limiting-amino-acids-in-the-diets-of-endurance-trained-men-after-a-bout-of-prolonged-exercise
#13
Hiroyuki Kato, Katsuya Suzuki, Makoto Bannai, Daniel R Moore
Background: The indicator amino acid oxidation (IAAO) method estimates the protein intake required to maximize whole-body protein synthesis and identify the daily protein requirement in a variety of populations. However, it is unclear whether the greater requirements for endurance athletes previously determined by the IAAO reflect an increased demand for all or only some amino acids. Objective: The aim of this study was to determine the primary rate-limiting amino acids in endurance-trained athletes after prolonged exercise, by measuring the oxidation of ingested [1-13C]phenylalanine in response to variable amino acid intake...
May 9, 2018: Journal of Nutrition
https://www.readbyqxmd.com/read/29746386/whole-body-high-intensity-interval-training-induce-similar-cardiorespiratory-adaptations-compared-with-traditional-high-intensity-interval-training-and-moderate-intensity-continuous-training-in-healthy-men
#14
Gustavo Z Schaun, Stephanie S Pinto, Mariana R Silva, Davi B Dolinski, Cristine L Alberton
Schaun, GZ, Pinto, SS, Silva, MR, Dolinski, DB, and Alberton, CL. Sixteen weeks of whole-body high-intensity interval training induce similar cardiorespiratory responses compared with traditional high-intensity interval training and moderate-intensity continuous training in healthy men. J Strength Cond Res XX(X): 000-000, 2018-Low-volume high-intensity interval training (HIIT) protocols that use the body weight as resistance could be an interesting and inexpensive alternative to traditional ergometer-based high-intensity interval training (HIIT-T) and moderate-intensity continuous training (MICT)...
May 7, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29745780/heat-acclimation-by-post-exercise-hot-water-immersion-in-the-morning-reduces-thermal-strain-during-morning-and-afternoon-exercise-heat-stress
#15
Michael J Zurawlew, Jessica A Mee, Neil P Walsh
PURPOSE: Recommendations state that to acquire the greatest benefit from heat acclimation the clock-time of heat acclimation sessions should match the clock-time of expected exercise-heat stress. It remains unknown if adaptations by post-exercise hot water immersion (HWI) demonstrate time of day dependent adaptations. Thus, we examined whether adaptations following post-exercise HWI completed in the morning were present during morning and afternoon exercise-heat stress. METHODS: Ten males completed an exercise-heat stress test commencing in the morning (0945-h: AM) and afternoon (1445-h: PM; 40 min; 65% V̇O2max treadmill run) before (PRE) and after (POST) heat acclimation...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745772/specificity-elicits-higher-maximal-and-submaximal-cardiorespiratory-responses-during-a-new-taekwondo-aerobic-test
#16
Matheus Hausen, Pedro Paulo Soares, Marcus Paulo Araujo, Débora Esteves, Hilbert Julio, Roberto Tauil, Marcus Junca, Flávia Porto, Emerson Franchini, Craig Alan Bridge, Jonas Gurgel
PURPOSE: The purpose of the present study was to propose and validate new taekwondo-specific cardiopulmonary exercise tests. METHODS: Twelve male national-level taekwondo athletes (age 20 ± 2 yrs; body mass 67.5 ± 5.7 kg; height 175 ± 8 cm; training experience 7 ± 3 yrs) performed three separate exercise tests in a randomized counterbalanced order: 1) a Treadmill Running Cardiopulmonary Exercise Test (CPET); 2) Continuous and 3) Interval Taekwondo Cardiopulmonary Exercise Tests (cTKDet and iTKDet, respectively)...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29744011/noninvasive-evaluation-of-symptomatic-women-with-suspected-coronary-artery-disease
#17
REVIEW
Mohammed A Chamsi-Pasha, Karla M Kurrelmeyer
Cardiovascular disease (CVD) is the leading cause of death in the United States, yet several factors make it challenging to diagnose in women. Although women have more frequent chest pain than men, atypical symptoms such as nausea, dyspnea, and fatigue make it difficult to determine their risk of coronary artery disease (CAD) before testing. Current guidelines recommend exercise electrocardiography (ex-ECG) as the initial test in symptomatic women with intermediate pretest probability who can exercise and have a normal resting ECG; however, treadmill ex-ECG testing has a significantly lower positive predictive value in women...
October 2017: Methodist DeBakey Cardiovascular Journal
https://www.readbyqxmd.com/read/29743909/improvement-of-physical-capacity-in-patients-undergoing-transcatheter-closure-of-atrial-septal-defects
#18
Paweł Prochownik, Tadeusz Przewłocki, Piotr Podolec, Piotr Wilkołek, Bartosz Sobień, Urszula Gancarczyk, Natalia Podolec, Monika Komar
Introduction: Atrial septal defect (ASD) is the most common congenital cardiac anomaly diagnosed in adults. It often remains asymptomatic until the fourth or fifth decade of life. Significant left-to-right interatrial shunting is associated with the risk of heart failure, pulmonary hypertension and atrial fibrillation. Percutaneous ASD closure is a recognized method of treatment. Aim: To evaluate the clinical outcomes and physical capacity in patients undergoing transcatheter closure of ostium secundum ASD...
2018: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/29740398/neurosteroids-in-adult-hippocampus-of-male-and-female-rodents-biosynthesis-and-actions-of-sex-steroids
#19
REVIEW
Yasushi Hojo, Suguru Kawato
The brain is not only the target of steroid hormones but also is able to locally synthesize steroids de novo . Evidence of the local production of steroids in the brain has been accumulating in various vertebrates, including teleost fish, amphibia, birds, rodents, non-human primates, and humans. In this review, we mainly focus on the local production of sex steroids in the hippocampal neurons of adult rodents (rats and mice), a center for learning and memory. From the data of the hippocampus of adult male rats, hippocampal principal neurons [pyramidal cells in CA1-CA3 and granule cells in dentate gyrus (DG)] have a complete system for biosynthesis of sex steroids...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29739647/estimation-of-the-blood-pressure-response-with-exercise-stress-testing
#20
Benjamin T Fitzgerald, Emma L Ballard, Gregory M Scalia
BACKGROUND: The blood pressure response to exercise has been described as a significant increase in systolic BP (sBP) with a smaller change in diastolic BP (dBP). This has been documented in small numbers, in healthy young men or in ethnic populations. This study examines these changes in low to intermediate risk of myocardial ischaemia in men and women over a wide age range. METHODS: Consecutive patients having stress echocardiography were analysed. Ischaemic tests were excluded...
April 20, 2018: Heart, Lung & Circulation
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