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Anaerobic threshold

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https://www.readbyqxmd.com/read/29776810/congenital-heart-disease-in-adults-assessmentof-functional-capacity-using-cardiopulmonary-exercise-testing
#1
Sílvia Aguiar Rosa, Ana Agapito, Rui M Soares, Lídia Sousa, José Alberto Oliveira, Ana Abreu, Ana Sofia Silva, Sandra Alves, Helena Aidos, Fátima F Pinto, Rui Cruz Ferreira
AIM: The aim of the study was to compare functional capacity in different types of congenital heart disease (CHD), as assessed by cardiopulmonary exercise testing (CPET). METHODS: A retrospective analysis was performed of adult patients with CHD who had undergone CPET in a single tertiary center. Diagnoses were divided into repaired tetralogy of Fallot, transposition of the great arteries (TGA) after Senning or Mustard procedures or congenitally corrected TGA, complex defects, shunts, left heart valve disease and right ventricular outflow tract obstruction...
May 15, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29757824/improvements-in-key-cardiopulmonary-exercise-testing-variables-following-cardiac-rehabilitation-in-patients-with-coronary-artery-disease
#2
Dejana Popovic, Nikhil Kumar, Sundeep Chaudhry, Akshay Bagai, Ross Arena, Naresh Kumar
PURPOSE: Improvements in cardiorespiratory fitness (VO2peak) post-cardiac rehabilitation (post-CR) are used to gauge therapeutic efficacy. The aim of the present study was to assess the effect of supervised CR on other cardiopulmonary exercise testing (CPX) variables, specifically those that reflect ventilatory efficiency and VO2 changes in relation to changes in work rate (WR). METHODS: Patients (n = 142; mean age 63 ± 9 y; 23% female) with coronary artery disease (CAD) participated in supervised CR for 3 to 6 mo completing 60 ± 17 sessions (range: 32-96 sessions), with intensity derived from the baseline CPX...
May 11, 2018: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/29745785/dose-response-relationship-between-training-load-and-changes-in-aerobic-fitness-in-professional-youth-soccer-players
#3
John F Fitzpatrick, Kirsty M Hicks, Philip R Hayes
PURPOSE: The aim of this study was to compare the dose-response relationship between, traditional arbitrary speed thresholds versus an individualised approach, with changes in aerobic fitness in professional youth soccer players. METHODS: Fourteen youth soccer players, completed a 1500 metre time trial to estimate maximal aerobic speed (km.h-1 , (MAS)) at the start and the end of a six week period. Training load was monitored on a daily basis during this study. External load measures were; total distance covered (TD), total acceleration and deceleration distance > 2m...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29741624/anaerobic-carbon-monoxide-metabolism-by-pleomorphomonas-carboxyditropha-sp-nov-a-new-mesophilic-hydrogenogenic-carboxydotroph
#4
Sofia Esquivel-Elizondo, Juan Maldonado, Rosa Krajmalnik-Brown
Carbon monoxide (CO)-metabolism and phenotypic and phylogenetic characterization of a novel anaerobic, mesophilic and hydrogenogenic carboxydotroph are reported. Strain SVCO-16 was isolated from anaerobic sludge and grows autotrophically and mixotrophically with CO. The genes cooS and cooF, coding for a CO dehydrogenase complex, and genes similar to hycE2, encoding a CO-induced hydrogenase, were present in its genome. The isolate produces H2 and CO2 from CO, and acetate and formate from organic substrates. Based on the 16S rRNA sequence, it is an Alphaproteobacterium most closely related to the genus Pleomorphomonas (98...
June 1, 2018: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29727012/reliability-of-repeated-arm-crank-cardiopulmonary-exercise-tests-in-patients-with-small-abdominal-aortic-aneurysm
#5
J W Durrand, K Wagstaff, A Kasim, L Cawthorn, G R Danjoux, E Kothmann
Arm-crank ergometry may be useful in patients unable to pedal, for instance due to peripheral arterial disease. Twenty participants with small abdominal aortic aneurysm undertook two serial arm-crank tests and then a pedal test, four of whom had indeterminate anaerobic thresholds, precluding analysis. The mean (SD) peak arm and leg oxygen consumptions in 16 participants were 13.71 (2.62) ml.kg-1 .min-1 and 16.82 (4.44) ml.kg-1 .min-1 , with mean (SD) individual differences of 3.11 (2.48) ml.kg-1 .min-1 , p = 0...
May 4, 2018: Anaesthesia
https://www.readbyqxmd.com/read/29722253/running-economy-and-energy-cost-of-running-with-backpacks
#6
Volker Scheer, Leoni Cramer, Hans-Christian Heitkamp
BACKGROUND: Running is a popular recreational activity and additional weight is often carried in backpacks on longer runs. Our aim was to examine running economy and other physiological parameters while running with a 1kg and 3 kg backpack at different submaximal running velocities. METHODS: 10 male recreational runners (age 25 ± 4.2 years, VO2peak 60.5 ± 3.1 ml·kg-1·min-1) performed runs on a motorized treadmill of 5 minutes durations at three different submaximal speeds of 70, 80 and 90% of anaerobic lactate threshold (LT) without additional weight, and carrying a 1kg and 3 kg backpack...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29722247/-progress-on-the-regulation-of-quorum-sensing-in-wastewater-treatment
#7
Song Ya Li, Xue Ning Fei, Xiu Mei Jiao, Le Wang, Yan Jun Xing
Quorum sensing is a phenomenon that microorganisms secrete some signal molecules, when such molecules accumulate to a threshold level, which would realize the information communication by regulating specific gene expression. Quorum sensing, which is widely found in information communication of various microorganisms, regulates a variety of social behaviors, such as biofilm formation, public goods production, and gene horizontal transfer of bacteria. The phenomenon of quorum sensing is widespread in biological aggregates, such as activated sludge, biofilm and granular sludge...
March 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29721434/physiological-parameter-values-in-greyhounds-before-and-after-high-intensity-exercise
#8
Francisco Javier Pellegrino, Analía Risso, Pablo G Vaquero, Yanina A Corrada
Dog sports competitions have greatly expanded. The availability of reference values for each type of activity could help assess fitness accurately. Heart rate (HR), blood lactate (BL) and rectal temperature (RT) are relevant physiological parameters to determine the dogs response to effort. Previous studies in greyhounds have reported the effect of high-intensity exercise on many physiological parameters immediately after completing different racing distances and recovery times. However, there are no studies concerning physiological changes over shorter racing distances...
2018: Open Veterinary Journal
https://www.readbyqxmd.com/read/29720949/active-recovery-after-high-intensity-interval-training-does-not-attenuate-training-adaptation
#9
Thimo Wiewelhove, Christoph Schneider, Alina Schmidt, Alexander Döweling, Tim Meyer, Michael Kellmann, Mark Pfeiffer, Alexander Ferrauti
Objective: High-intensity interval training (HIIT) can be extremely demanding and can consequently produce high blood lactate levels. Previous studies have shown that lactate is a potent metabolic stimulus, which is important for adaptation. Active recovery (ACT) after intensive exercise, however, enhances blood lactate removal in comparison with passive recovery (PAS) and, consequently, may attenuate endurance performance improvements. Therefore, the aim of this study was to examine the influence of regular ACT on training adaptations during a HIIT mesocycle...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29719514/longer-work-rest-intervals-during-high-intensity-interval-training-hiit-lead-to-elevated-levels-of-mir-222-and-mir-29c
#10
Boris Schmitz, Florian Rolfes, Katrin Schelleckes, Mirja Mewes, Lothar Thorwesten, Michael Krüger, Andreas Klose, Stefan-Martin Brand
Aim: MicroRNA-222 (miR-222) and miR-29c have been identified as important modulators of cardiac growth and may protect against pathological cardiac remodeling. miR-222 and -29c may thus serve as functional biomarkers for exercise-induced cardiac adaptations. This investigation compared the effect of two workload-matched high-intensity interval training (HIIT) protocols with different recovery periods on miR-222 and -29c levels. Methods: Sixty-three moderately trained females and males (22.0 ± 1.7 years) fulfilled the eligibility criteria and were randomized into two HIIT groups using sex and exercise capacity...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29719466/effect-of-high-dose-ginsenoside-complex-ug0712-supplementation-on-physical-performance-of-healthy-adults-during-a-12-week-supervised-exercise-program-a-randomized-placebo-controlled-clinical-trial
#11
Eon Sook Lee, Yun Jun Yang, Jun Hyung Lee, Yeong Sook Yoon
Background: Ginseng has been used as an ergogenic agent, although evidence for its effectiveness is weak. A randomized, double-blind, placebo-controlled clinical trial was conducted to evaluate the effect of a ginsenoside complex (UG0712) on changes in exercise performance. Methods: Sedentary individuals ( n   =  117) were randomly assigned into one of three groups: low-dose ginsenoside supplementation (100 mg/d, n   =  39), high-dose ginsenoside supplementation (500 mg/d, n   =  39), or a placebo group (500 mg/d, n   =  39)...
April 2018: Journal of Ginseng Research
https://www.readbyqxmd.com/read/29698982/a-fast-track-to-hypoalgesia-the-anaerobic-exercise-effect-on-pain-sensitivity
#12
Gil Samuelly-Leichtag, Einat Kodesh, Yoav Meckel, Irit Weissman-Fogel
Maximal anaerobic exercise, is a short high intensity effort, involves activation of the hypothalamus-pituitary-adrenal axis, and may suggest hypoalgesic effects. In addition, this exercise-induced muscle pain may contribute to hypoalgesia via the pain inhibits pain phenomenon, which is related to the diffuse noxious inhibitory control (DNIC) mechanism. We aimed to investigate whether: 1) a single bout of 30 s maximal anaerobic exercise has an analgesic effect on experimental pain sensitivity; 2) DNIC is the underlying mechanism of anaerobic exercise-induced hypoalgesia (EIH)...
April 26, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29692190/routine-pre-and-post-neoadjuvant-chemotherapy-fitness-testing-is-not-indicated-for-oesophagogastric-cancer-surgery
#13
R J Drummond, D Vass, H Wadhawan, C F Craig, C K MacKay, G M Fullarton, M J Forshaw
Introduction There is a known correlation between anaerobic threshold (AT) during cardiopulmonary exercise testing and development of cardiopulmonary complications in high-risk patients undergoing oesophagogastric cancer surgery. This study aimed to assess the value of routine retesting following neoadjuvant chemotherapy. Methods Patients undergoing neoadjuvant chemotherapy with subsequent oesophagogastric cancer surgery with pre- and post-neoadjuvant chemotherapy cardiopulmonary exercise data were identified from a prospectively maintained database...
April 25, 2018: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/29683925/short-term-8-weeks-high-intensity-interval-training-in-diseased-cohorts
#14
James E M Blackwell, Brett Doleman, Philip J J Herrod, Samuel Ricketts, Bethan E Phillips, Jonathan N Lund, John P Williams
BACKGROUND & AIM: Exercise training regimes can lead to improvements in measures of cardiorespiratory fitness (CRF), improved general health, and reduced morbidity and overall mortality risk. High intensity interval training (HIIT) offers a time-efficient approach to improve CRF in healthy individuals, but the relative benefits of HIIT compared to traditional training methods are unknown in across different disease cohorts. METHODS: This systematic review and meta-analysis compares CRF gains in randomised controlled trials of short-term (<8 weeks) HIIT vs...
April 21, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29678110/experimental-evidence-for-in-situ-nitric-oxide-production-in-anaerobic-ammonia-oxidizing-bacterial-granules
#15
Rathnayake M L D Rathnayake, Mamoru Oshiki, Satoshi Ishii, Takahiro Segawa, Hisashi Satoh, Satoshi Okabe
Although nitric oxide (NO) emissions from anaerobic ammonium oxidation (anammox)-based processes were reported previously, the NO production pathways are poorly understood. Here, we investigated the NO production pathways in anammox granules in detail by combining 15 N-stable isotope tracer experiments with various inhibitors, microsensor measurements, and transcriptome analysis for key genes of NO2 - reduction. NO was emitted from the anammox granules, which account for 0.07% of the N2 emission. 15 N-stable isotope-tracer experiments indicated that most of the N2 was produced by anammox bacteria, whereas NO was produced from NO2 - reduction by anammox and denitrifying bacteria...
April 20, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29667097/an-elevated-respiratory-quotient-predicts-complications-after-cardiac-surgery-under-extracorporeal-circulation-an-observational-pilot-study
#16
J Piot, A Hébrard, M Durand, J F Payen, P Albaladejo
Following cardiac surgery, hyperlactatemia due to anaerobic metabolism is associated with an increase in both morbidity and mortality. We previously found that an elevated respiratory quotient (RQ) predicts anaerobic metabolism. In the present study we aimed to demonstrate that it is also associated with poor outcome following cardiac surgery. This single institution, prospective, observational study includes all those patients that were consecutively admitted to the intensive care unit (ICU) after cardiac surgery with cardiopulmonary bypass, that had also been monitored using pulmonary artery catheter...
April 17, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29666705/the-role-of-moderate-aerobic-exercise-as-determined-by-cardiopulmonary-exercise-testing-in-als
#17
Anna Caroline Marques Braga, Anabela Pinto, Susana Pinto, Mamede de Carvalho
Introduction: The efficacy of cardiopulmonary exercise testing (CPET) to determining exercise intensity has not been established in Amyotrophic Lateral Sclerosis (ALS). We studied this intervention. Methods: We included 48 ALS patients randomized in 2 groups: G1 ( n = 24), exercise intensity leveled by CPET; G2 ( n = 24), standard care limited by fatigue, during 6 months. ALS functional scale (ALSFRS-R) and forced vital capacity (FVC) were performed every 3 months; CPET was done at admission ( T 1) and 6 months later ( T 2)...
2018: Neurology Research International
https://www.readbyqxmd.com/read/29660535/turf-soil-enhances-treatment-efficiency-and-performance-of-phenolic-wastewater-in-an-up-flow-anaerobic-sludge-blanket-reactor
#18
Chunmao Chen, Xianyang Yao, Qing X Li, Qinghong Wang, Jiahao Liang, Simin Zhang, Jie Ming, Zhiyuan Liu, Jingmin Deng, Brandon A Yoza
Phenols are industrially generated intermediate chemicals found in wastewaters that are considered a class of environmental priority pollutants. Up-flow anaerobic sludge blanket (UASB) reactors are used for phenolic wastewater treatment and exhibit high volume loading capability, favorable granule settling, and tolerance to impact loads. Use of support materials can promote biological productivity and accelerate start-up period of UASB. In the present study, turf soil was used as a support material in a mesophilic UASB reactor for the removal of phenols in wastewater...
April 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29623546/exercise-rehabilitation-in-ventricular-assist-device-recipients-a-meta-analysis-of-effects-on-physiological-and-clinical-outcomes
#19
REVIEW
Liza Grosman-Rimon, Spencer D Lalonde, Nina Sieh, Maureen Pakosh, Vivek Rao, Paul Oh, Sherry L Grace
Exercise rehabilitation in heart failure patients has been shown to improve quality of life (QoL) and survival. It is also recommended in clinical practice guidelines for ventricular assist device (VAD) recipients. However, there have only been two meta-analyses on the effects of exercise rehabilitation in VAD patients, on only two outcomes. The objective of the review was to quantitatively evaluate the effect of exercise rehabilitation in VAD recipients on functional capacity, exercise physiology parameters, chronotropic responses, inflammatory biomarkers and neurohormones, heart structure and function, and clinical outcomes...
April 6, 2018: Heart Failure Reviews
https://www.readbyqxmd.com/read/29621885/improvement-in-exercise-capacity-and-delayed-anaerobic-metabolism-induced-by-far-infrared-emitting-garments-in-active-healthy-subjects-a-pilot-study
#20
Valentina Mantegazza, Mauro Contini, Maurizia Botti, Ada Ferri, Francesca Dotti, Pierluigi Berardi, Piergiuseppe Agostoni
Background Far-infrared-emitting garments have several biological properties including the capability to increase blood perfusion in irradiated tissues. Design The aim of the study was to evaluate whether far-infrared radiation increases exercise capacity and delays anaerobic metabolism in healthy subjects. Methods With a double-blind, crossover protocol, a maximal cardiopulmonary exercise test was performed in 20 volunteers, wearing far-infrared or common sport clothes, identical in texture and colour. Results Comparing far-infrared with placebo garments, higher oxygen uptake at peak of exercise and longer endurance time were observed (peak oxygen uptake 38...
January 1, 2018: European Journal of Preventive Cardiology
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