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Anaerobic threshold

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https://www.readbyqxmd.com/read/29140913/sex-differences-in-aerobic-fitness-in-top-class-soccer-referees
#1
Carlo Castagna, Mario Bizzini, Stefano DʼOttavio, Susana C Araújo Póvoas
Castagna, C, Bizzini, M, D'Ottavio, S, and Araújo Póvoas, SC. Gender differences in aerobic fitness in top-class soccer referees. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to assess the aerobic-fitness differences between male and female top-class soccer field referees (FRs). This with the purpose to provide cutoff values useful for training prescription in female FRs. Forty female top-class FRs (age 34.18 ± 3.50 years and 5 ± 3.9 years international refereeing experience) and 52 male FRs (age 38...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140615/operator-exposure-to-hydrogen-sulfide-from-dairy-manure-storages-containing-gypsum-bedding
#2
Eileen E Fabian-Wheeler, Michael L Hile, Dennis J Murphy, Davis E Hill, Robert Meinen, Robin C Brandt, Hershel A Elliott, Daniel Hofstetter
Dairy manure storages containing gypsum-based bedding have been linked anecdotally with injury and death due to presumed dangerous levels of gases released. Recycled gypsum products are used as a cost-effective bedding alternative to improve animal welfare and provide agronomic benefits to manure recycled back to the land. Sulfur contained in gypsum (calcium sulfate) can contribute to hydrogen sulfide (H2S) gas formation under the anaerobic storage conditions typical of dairy manure slurry. Disturbance of stored manure during agitation releases a burst of volatile gases...
January 26, 2017: Journal of Agricultural Safety and Health
https://www.readbyqxmd.com/read/29138757/effects-of-marathon-running-on-aerobic-fitness-and-performance-in-recreational-runners-one-week-after-a-race
#3
Fuminori Takayama, Atsushi Aoyagi, Wataru Shimazu, Yoshiharu Nabekura
It is not clear whether or not recreational runners can recover aerobic fitness and performance within one week after marathon running. This study aimed to investigate the effects of running a marathon race on aerobic fitness and performance one week later. Eleven recreational runners (six men, five women) completed the race in 3 h 36 min 20 s ± 41 min 34 s (mean ± standard deviation). Before and 7 days after the race, they performed a treadmill running test. Perceived muscle soreness was assessed before the race and for the following 7 days...
2017: Journal of Sports Medicine (Hindawi Publishing Corporation)
https://www.readbyqxmd.com/read/29103645/emissions-of-volatile-sulfur-compounds-vscs-throughout-wastewater-biosolids-processing
#4
R M Fisher, N Le-Minh, J P Alvarez-Gaitan, S J Moore, R M Stuetz
Volatile sulfur compounds (VSCs) are important contributors to nuisance odours from the processing of wastewater sludge and biosolids. However, emission characteristics are difficult to predict as they vary between sites and are likely to be affected by biosolids processing configuration and operation. VSC emissions from biosolids throughout 6 wastewater treatment plants (WWTPs) in Sydney, Australia were examined in this study. H2S was the VSC found at the highest concentrations throughout the WWTPs, with concentrations ranging from 7 to 39,000μg/m(3)...
November 2, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29089343/impact-of-atrial-fibrillation-on-exercise-capacity-and-mortality-in-heart-failure-with-preserved-ejection-fraction-insights-from-cardiopulmonary-stress-testing
#5
Mohamed B Elshazly, Todd Senn, Yuping Wu, Bruce Lindsay, Walid Saliba, Oussama Wazni, Leslie Cho
BACKGROUND: Atrial fibrillation (AF) has been objectively associated with exercise intolerance in patients with heart failure with reduced ejection fraction; however, its impact in patients with heart failure with preserved ejection fraction has not been fully scrutinized. METHODS AND RESULTS: We identified 1744 patients with heart failure and ejection fraction ≥50% referred for cardiopulmonary stress testing at the Cleveland Clinic (Cleveland, OH), 239 of whom had AF...
October 31, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29063207/cardiorespiratory-fitness-and-cardiac-autonomic-function-in-diabetes
#6
REVIEW
Martin Röhling, Alexander Strom, Gidon J Bönhof, Michael Roden, Dan Ziegler
PURPOSE OF REVIEW: This review summarizes the current knowledge on the relationship of physical activity, exercise, and cardiorespiratory fitness (CRF) with cardiovascular autonomic neuropathy (CAN) based on epidemiological, clinical, and interventional studies. RECENT FINDINGS: The prevalence of CAN increases with age and duration of diabetes. Further risk factors for CAN comprise poor glycemic control, dyslipidemia, abdominal obesity, hypertension, and the presence of diabetic complications...
October 23, 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/29053066/different-times-of-day-do-not-change-heart-rate-variability-recovery-after-light-exercise-in-sedentary-subjects-24%C3%A2-hours-holter-monitoring
#7
Eliza Prodel, Tiago Peçanha, Lilian Pinto Da Silva, Rogério Baumgratz De Paula, Daniel Godoy Martinez, Jorge Roberto Perrout De Lima, Mateus Camaroti Laterza
Incidence of cardiovascular events follows a circadian rhythm with peak occurrence during morning. Disturbance of autonomic control caused by exercise had raised the question of the safety in morning exercise and its recovery. Furthermore, we sought to investigate whether light aerobic exercise performed at night would increase HR and decrease HRV during sleep. Therefore, the aim of this study was to test the hypothesis that morning exercise would delay HR and HRV recovery after light aerobic exercise, additionally, we tested the impact of late night light aerobic exercise on HR and HRV during sleep in sedentary subjects...
October 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29040646/statins-affect-skeletal-muscle-performance-evidence-for-disturbances-in-energy-metabolism
#8
Neeltje A E Allard, Tom J J Schirris, Rebecca J Verheggen, Frans G M Russel, Richard J Rodenburg, Jan A M Smeitink, Paul D Thompson, Maria T E Hopman, Silvie Timmers
Context: Statin myopathy is linked to disturbances in mitochondrial function and exercise intolerance. Objectives: To determine whether differences exist in exercise performance, muscle function and mitochondrial oxidative capacity and content between symptomatic and asymptomatic statin users, and non-statin using controls. Design: Cross-sectional study. Setting: Department of Physiology of the Radboud University Medical Center...
October 9, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29036765/development-of-an-anaerobic-threshold-hrlt-hrvt-estimation-equation-using-the-heart-rate-threshold-hrt-during-the-treadmill-incremental-exercise-test
#9
Joo-Ho Ham, Hun-Young Park, Youn-Ho Kim, Sang-Kon Bae, Byung-Hoon Ko, Sang-Seok Nam
PURPOSE: The purpose of this study was to develop a regression model to estimate the heart rate at the lactate threshold (HRLT) and the heart rate at the ventilatory threshold (HRVT) using the heart rate threshold (HRT), and to test the validity of the regression model. METHODS: We performed a graded exercise test with a treadmill in 220 normal individuals (men: 112, women: 108) aged 20-59 years. HRT, HRLT, and HRVT were measured in all subjects. A regression model was developed to estimate HRLT and HRVT using HRT with 70% of the data (men: 79, women: 76) through randomization (7:3), with the Bernoulli trial...
September 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/29029283/trajectories-of-cardiorespiratory-fitness-in-patients-with-juvenile-dermatomyositis
#10
Kiki J Blom, Tim Takken, Barbara C H Huijgen, Judith Wienke, Annet van Royen-Kerkhof, Marco van Brussel
Objectives: Previous research demonstrated decreased cardiorespiratory fitness (CRF) in patients with JDM during active disease and remission. However, longitudinal data regarding trajectories of CRF are currently lacking. The objective of this study was to determine trajectories of CRF in patients with both monocyclic and chronic JDM, and to identify potential predictors of these trajectories. Methods: Thirty-six patients with JDM [median age (interquartile range) at diagnosis: 8...
September 27, 2017: Rheumatology
https://www.readbyqxmd.com/read/28990651/randomized-feasibility-trial-of-high-intensity-interval-training-before-elective-abdominal-aortic-aneurysm-repair
#11
G A Tew, A M Batterham, K Colling, J Gray, K Kerr, E Kothmann, S Nawaz, M Weston, D Yates, G Danjoux
BACKGROUND: This study assessed the feasibility of a preoperative high-intensity interval training (HIT) programme in patients awaiting elective abdominal aortic aneurysm repair. METHODS: In this feasibility trial, participants were allocated by minimization to preoperative HIT or usual care. Patients in the HIT group were offered three exercise sessions per week for 4 weeks, and weekly maintenance sessions if surgery was delayed. Feasibility and acceptability outcomes were: rates of screening, eligibility, recruitment, retention, outcome completion, adverse events and adherence to exercise...
October 9, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28988207/leg-lean-mass-correlates-with-exercise-systemic-output-in-young-fontan-patients
#12
Catherine M Avitabile, David J Goldberg, Mary B Leonard, Zhenglun Alan Wei, Elaine Tang, Stephen M Paridon, Ajit P Yoganathan, Mark A Fogel, Kevin K Whitehead
OBJECTIVE: We previously described lower leg lean mass Z-scores (LLMZ) in Fontan patients associated with worse peak oxygen consumption on metabolic exercise testing. We hypothesised that LLMZ correlates with indexed systemic flow (Qsi) and cardiac index (CI) on exercise cardiac magnetic resonance (eCMR). METHODS: Thirteen patients had LLM measured by dual-energy X-ray absorptiometry within mean 40 (range 0-258) days of eCMR. LLM was converted to sex and race-specific Z-scores based on healthy reference data...
October 7, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28965267/exercise-performance-and-quality-of-life-in-children-with-cystic-fibrosis-and-mildly-impaired-lung-function-relation-with-antibiotic-treatments-and-hospitalization
#13
Kristof Vandekerckhove, Michiel Keyzer, Jasper Cornette, Ilse Coomans, Filip Pyl, Frans De Baets, Petra Schelstraete, Filomeen Haerynck, Daniel De Wolf, Sabine Van Daele, Jan Boone
This study evaluates the impact of antibiotic treatments and hospitalization on exercise performance and health-related quality of life (QOL) in children with mild cystic fibrosis (CF) lung disease. Forty-seven children between 7 and 17 years with mild CF underwent a maximal exercise test including spiro-ergometry and filled out a QOL-questionnaire (PedsQL™). Amount of antibiotic treatments (AB) and hospitalization days in the last 3 years were reviewed. FEV1% was mildly decreased (91.7 ± 17.9 L/min, p = 0...
December 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28953985/relationship-between-aerobic-capacity-and-pelvic-floor-muscles-function-a-cross-sectional-study
#14
S P Jürgensen, A Borghi-Silva, A M F G Bastos, G N Correia, V S Pereira-Baldon, R Cabiddu, A M Catai, P Driusso
The objective of this study was to evaluate the relationship between aerobic capacity and pelvic floor muscles (PFM) function in adult women. Women aged 18 or over and without urinary dysfunction or other chronic diseases were eligible to participate. They completed the habitual physical activity (HPA) questionnaire, underwent a PFM functional evaluation by palpation and perineometry, and performed a submaximal (between 75 and 85% of maximum heart rate) cardiopulmonary exercise (CPX) test to determine the ventilatory anaerobic threshold (VAT)...
September 21, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28935128/quality-of-life-and-sleep-quality-are-similarly-improved-after-aquatic-or-dry-land-aerobic-training-in-patients-with-type-2-diabetes-a-randomized-clinical-trial
#15
Rodrigo S Delevatti, Felipe Barreto Schuch, Ana Carolina Kanitz, Cristine L Alberton, Elisa Corrêa Marson, Salime Chedid Lisboa, Carolina Dertzbocher Feil Pinho, Luciana Peruchena Bregagnol, Maríndia Teixeira Becker, Luiz Fernando M Kruel
OBJECTIVES: To compare the effects of two aerobic training models in water and on dry-land on quality of life, depressive symptoms and sleep quality in patients with type 2 diabetes. DESIGN: Randomized clinical trial. METHODS: Thirty-five patients with type 2 diabetes were randomly assigned to aquatic aerobic training group (n=17) or dry-land aerobic training group (n=18). Exercise training length was of 12 weeks, performed in three weekly sessions (45min/session), with intensity progressing from 85% to 100% of heart rate of anaerobic threshold during interventions...
September 6, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28933324/photobacterium-toruni-sp-nov-a-bacterium-isolated-from-diseased-farmed-fish
#16
Alejandro M Labella, David R Arahal, Teresa Lucena, Manuel Manchado, Dolores Castro, Juan J Borrego
Three bacterial strains were isolated from liver and spleen of diseased farmed redbanded seabream (Pagrus auriga) in south-west Spain. Their partial 16S rRNA gene sequences clustered within those of the genus Photobacterium, showing high similarity (98.6-99.3 %) to the type strains of Photobacterium iliopiscarium, P. piscicola, P. kishitanii, P. aquimaris and P. phosphoreum. Multilocus sequence analysis using six housekeeping genes (gapA, topA, mreB, ftsZ, gyrB and 16S rRNA) confirmed the new strains as forming an independent branch with a bootstrap value of 100, likely to represent a novel species...
September 21, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28930880/cycling-power-outputs-predict-functional-threshold-power-and-maximum-oxygen-uptake
#17
Joshua Denham, John Scott-Hamilton, Amanda D Hagstrom, Adrian J Gray
Functional threshold power (FTP) has emerged as a correlate of lactate threshold and is commonly assessed by recreational and professional cyclists for tailored exercise programing. To identify whether results from traditional aerobic and anaerobic cycling tests could predict FTP and V˙ O2max, we analysed the association between estimated FTP, maximum oxygen uptake (V˙ O2max [mlkgmin]) and power outputs obtained from a maximal cycle ergometry cardiopulmonary exercise test (CPET) and a 30-s Wingate test in a heterogeneous cohort of cycle-trained and untrained individuals (N=40, mean±SD; age: 32...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28875971/-exercise-capacity-in-patients-with-pulmonary-sarcoidosis
#18
Justyna Błaut-Jurkowska, Klaudia Knap, Magdalena Kaźnica-Wiatr, Agnieszka Żygadło, Lidia Tomkiewicz-Pająk, Piotr Podolec, Maria Olszowska
Exertional dyspnea is a common manifestation of sarcoidosis. Cardiopulmonary exercise testing (CPET) is a useful tool to evaluate exercise tolerance of sarcoid patients. AIM: The aim of the study was to evaluate of exercise capacity in patients with pulmonary sarcoidosis with regard to duration of the disease. Analysis of differences in physical tolerance between patients with cardiac sarcoidosis and without cardiac sarcoidosis. MATERIALS AND METHODS: 39 patients diagnosed with pulmonary sarcoidosis were enrolled to our study...
August 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28865866/postexercise-hypotension-during-different-water-based-concurrent-training-intrasession-sequences-in%C3%A2-young-women
#19
Stephanie Santana Pinto, Daniel Umpierre, Hector Kerchirne Ferreira, Gabriela Neves Nunes, Rodrigo Ferrari, Cristine Lima Alberton
The purpose of the study was to compare the acute effects of water-based resistance-aerobic (RA) and aerobic-resistance (AR) sequences on systolic blood pressure, diastolic blood pressure (DBP), and mean blood pressure (MBP) in young women. Thirteen active women participated in four sessions: (1) exercises familiarization, (2) aquatic maximal test to determine the heart rate (HR) corresponding to the anaerobic threshold (HRAT), (3) concurrent protocol RA, and (4) concurrent protocol AR. Both protocols were initiated with the blood pressure measurements at rest in supine position...
August 24, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28859414/physiological-and-biomechanical-mechanisms-of-distance-specific-human-running-performance
#20
M A Thompson
Running events range from 60-m sprints to ultra-marathons covering 100 miles or more, which presents an interesting diversity in terms of the parameters for successful performance. Here, we review the physiological and biomechanical variations underlying elite human running performance in sprint to ultramarathon distances. Maximal running speeds observed in sprint disciplines are achieved by high vertical ground reaction forces applied over short contact times. To create this high force output, sprint events rely heavily on anaerobic metabolism, as well as a high number and large cross-sectional area of type II fibers in the leg muscles...
August 1, 2017: Integrative and Comparative Biology
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