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Anaerobic threshold

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https://www.readbyqxmd.com/read/28071950/reporting-individual-surgeon-outcomes-does-not-lead-to-risk-aversion-in-abdominal-aortic-aneurysm-surgery
#1
A Saratzis, A Thatcher, M F Bath, D A Sidloff, M J Bown, J Shakespeare, R D Sayers, C Imray
INTRODUCTION Reporting surgeons' outcomes has recently been introduced in the UK. This has the potential to result in surgeons becoming risk averse. The aim of this study was to investigate whether reporting outcomes for abdominal aortic aneurysm (AAA) surgery impacts on the number and risk profile (level of fitness) of patients offered elective treatment. METHODS Publically available National Vascular Registry data were used to compare the number of AAAs treated in those centres across the UK that reported outcomes for the periods 2008-2012, 2009-2013 and 2010-2014...
January 10, 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/28067808/effects-of-beetroot-juice-supplementation-on-cardiorespiratory-endurance-in-athletes-a-systematic-review
#2
REVIEW
Raúl Domínguez, Eduardo Cuenca, José Luis Maté-Muñoz, Pablo García-Fernández, Noemí Serra-Paya, María Carmen Lozano Estevan, Pablo Veiga Herreros, Manuel Vicente Garnacho-Castaño
Athletes use nutritional supplementation to enhance the effects of training and achieve improvements in their athletic performance. Beetroot juice increases levels of nitric oxide (NO), which serves multiple functions related to increased blood flow, gas exchange, mitochondrial biogenesis and efficiency, and strengthening of muscle contraction. These biomarker improvements indicate that supplementation with beetroot juice could have ergogenic effects on cardiorespiratory endurance that would benefit athletic performance...
January 6, 2017: Nutrients
https://www.readbyqxmd.com/read/28067536/history-of-erectile-dysfunction-as-a-predictor-of-poor-physical-performance-after-an-acute-myocardial-infarction
#3
Leonida Compostella, Caterina Compostella, Li Van Stella Truong, Nicola Russo, Tiziana Setzu, Sabino Iliceto, Fabio Bellotto
Background Erectile dysfunction may predict future cardiovascular events and indicate the severity of coronary artery disease in middle-aged men. The aim of this study was to evaluate whether erectile dysfunction (expression of generalized macro- and micro-vascular pathology) could predict reduced effort tolerance in patients after an acute myocardial infarction. Patients and methods One hundred and thirty-nine male patients (60 ± 12 years old), admitted to intensive cardiac rehabilitation 13 days after a complicated acute myocardial infarction, were evaluated for history of erectile dysfunction using the International Index of Erectile Function questionnaire...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28062459/biofilm-composition-and-threshold-concentration-for-growth-of-legionella-pneumophila-on-surfaces-exposed-to-flowing-warm-tap-water-without-disinfectant
#4
Dick van der Kooij, Geo L Bakker, Ronald Italiaander, Harm R Veenendaal, Bart A Wullings
: Legionella pneumophila in potable-water installations poses a potential health risk, but quantitative information about its replication in biofilms in relation to water quality is scarce. Therefore, biofilm formation on surfaces of glass and chlorinated polyvinyl chloride (CPVC) in contact with tap water at 34-39°C was investigated under controlled hydraulic conditions in a model system inoculated with biofilm-grown L. pneumophila The biofilm on glass (average steady-state concentration: 23 ± 9 pg ATP cm(-2)) exposed to treated aerobic groundwater [0...
January 6, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28043202/sex-specific-cardiopulmonary-exercise-testing-indices-related-to-hemodynamics-in-idiopathic-pulmonary-arterial-hypertension
#5
Ping Yuan, Tian-Xiang Chen, Bigyan Pudasaini, Jie Zhang, Jian Guo, Si-Jin Zhang, Lan Wang, Qin-Hua Zhao, Su-Gang Gong, Rong Jiang, Wen-Hui Wu, Jing He, Jin-Ming Liu, Qing-Hua Hu
BACKGROUND: Many studies have highlighted sex preponderance in idiopathic pulmonary arterial hypertension (IPAH). It is well established that there are differences in exercise capacities in the two sexes but how much of that difference reflects on disease severity or correlates to markers of severity in the two sexes is still not clear. Right heart catheterization (RHC) and cardiopulmonary exercise testing (CPET) have been widely used for assessing functional capacity, prognosis and treatment response in IPAH...
January 1, 2017: Therapeutic Advances in Respiratory Disease
https://www.readbyqxmd.com/read/28038810/lvad-pump-speed-increase-is-associated-with-increased-peak-exercise-cardiac-output-and-vo2-postponed-anaerobic-threshold-and-improved-ventilatory-efficiency
#6
Carlo Vignati, Anna Apostolo, Gaia Cattadori, Stefania Farina, Alberico Del Torto, Silvia Scuri, Gino Gerosa, Tomaso Bottio, Vincenzo Tarzia, Jonida Bejko, Erminio Sisillo, Flavia Nicoli, Susanna Sciomer, Francesco Alamanni, Stefania Paolillo, Piergiuseppe Agostoni
BACKGROUNDS: Peak exercise cardiac output (CO) increase is associated with an increase of peak oxygen uptake (VO2), provided that arteriovenous O2 difference [Δ(Ca-Cv)O2] does not decrease. At anaerobic threshold, VO2, is related to CO. We tested the hypothesis that, in heart failure (HF) patients with left ventricular assistance device (LVAD), an acute increase of CO obtained through changes in LVAD pump speed is associated with peak exercise and anaerobic threshold VO2 increase. METHODS: Fifteen of 20 patients bearing LVAD (Jarvik 2000) enrolled in the study successfully performed peak exercise evaluation...
December 22, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28034783/cerebellar-insulin-igf-1-signaling-in-diabetic-rats-effects-of-exercise-training
#7
Mariana Eiras Borges, Alessandra Mussi Ribeiro, José Rodrigo Pauli, Luciana Mendonça Arantes, Eliete Luciano, Leandro Pereira de Moura, José Alexandre Curiacos de Almeida Leme, Alessandra Medeiros, Natália Oliveira Bertolini, Clarice Yoshiko Sibuya, Ricardo José Gomes
The Diabetes Mellitus (DM) is a chronic disease associated with loss of brain regions such as the cerebellum, increasing the risk of developing neurodegenerative diseases such as Parkinson's disease (PD). In the brain of diabetic and PD organisms the insulin/IGF-1 signaling is altered. Exercise training is an effective intervention for the prevention of neurodegerative diseases since it release neurotrophic factors and regulating insulin/IGF-1 signaling in the brain. This study aimed to evaluate the proteins involved in the insulin/IGF-1 pathway in the cerebellum of diabetic rats subjected to exercise training protocol...
December 26, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/28033522/effects-of-nitrate-addition-on-water-column-methylmercury-in-occoquan-reservoir-virginia-usa
#8
Marc W Beutel, Ricardi Duvil, Francisco J Cubas, Thomas J Grizzard
Mercury bioaccumulation in aquatic biota poses a widespread threat to human and environmental health. Methylmercury (MeHg), the toxic form of mercury, tends to build up under anaerobic conditions in the profundal zones of lakes. In this study we performed a two-year assessment of spatial and temporal patterns of dissolved oxygen, nitrate, MeHg, manganese (Mn) and iron (Fe) in Occoquan Reservoir, a large run-of-the-river drinking water reservoir in Virginia, USA. A tributary to the reservoir receives input of nitrate-rich tertiary-treated wastewater that enhances the oxidant capacity of bottom water...
December 18, 2016: Water Research
https://www.readbyqxmd.com/read/28033123/accuracy-of-a-modified-lactate-minimum-test-and-reverse-lactate-threshold-test-to-determine-maximal-lactate-steady-state
#9
Patrick Wahl, Christian Manunzio, Florian Vogt, Sarah Strütt, Prisca Volmary, Wilhelm Bloch, Joachim Mester
This study evaluated the accuracy of a modified-lactate-minimum-test (mLMT), a modified-reverse-lactate-threshold-test (mRLT), in comparison to two established threshold concepts (OBLA & mDmax) to determine power output at maximal-lactate-steady-state (MLSS) in cycling. Nineteen subjects performed an mLMT, an mRLT, a graded-exercise-test (100W start, +20W every 3 min) and 3 or more constant-load tests of 30 minutes to determine power output at MLSS. The mLMT and mRLT both consisted of an initial lactate priming-segment, followed by a short recovery phase...
December 20, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27992585/effect-of-nickel-levels-on-hydrogen-partial-pressure-and-methane-production-in-methanogens
#10
Anna Neubeck, Susanne Sjöberg, Alex Price, Nolwenn Callac, Anna Schnürer
Hydrogen (H2) consumption and methane (CH4) production in pure cultures of three different methanogens were investigated during cultivation with 0, 0.2 and 4.21 μM added nickel (Ni). The results showed that the level of dissolved Ni in the anaerobic growth medium did not notably affect CH4 production in the cytochrome-free methanogenic species Methanobacterium bryantii and Methanoculleus bourgensis MAB1, but affected CH4 formation rate in the cytochrome-containing Methanosarcina barkeri grown on H2 and CO2...
2016: PloS One
https://www.readbyqxmd.com/read/27973374/inhibition-kinetics-and-granular-sludge-in-an-anammox-reactor-treating-mature-landfill-leachate
#11
Li Yun, Zheng Zhaoming, Li Jun, Zhao Baihang, Bian Wei, Zhang Yanzhuo, Wang Xiujie
The present study reports the inhibition kinetics and granular sludge in an anaerobic ammonium oxidation (ANAMMOX) - up-flow anaerobic sludge blanket reactor fed with diluted mature landfill leachate. The activity of ANAMMOX bacteria was inhibited by addition of mature landfill leachate, but gradually adapted to the leachate. The system achieved efficient nitrogen removal during 65-75 d and the average removal efficiencies for NH4(+)-N, NO2(-)-N and total nitrogen (TN) were 96%, 95% and 87%, respectively. ANAMMOX was the main pathway of nitrogen removal in the system, and heterotrophic denitrification occurred simultaneously...
December 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/27932039/anaerobic-digestion-of-nitrogen-rich-poultry-manure-impact-of-thermophilic-biogas-process-on-metal-release-and-microbial-resistances
#12
Reshma Anjum, Elisabeth Grohmann, Niclas Krakat
Poultry manure is a nitrogen rich fertilizer, which is usually recycled and spread on agricultural fields. Due to its high nutrient content, chicken manure is considered to be one of the most valuable animal wastes as organic fertilizer. However, when chicken litter is applied in its native form, concerns are raised as such fertilizers also include high amounts of antibiotic resistant pathogenic Bacteria and heavy metals. We studied the impact of an anaerobic thermophilic digestion process on poultry manure...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27930876/pioglitazone-on-improves-whole-body-aerobic-capacity-and-skeletal-muscle-energy-metabolism-in-patients-with-metabolic-syndrome
#13
Takashi Yokota, Shintaro Kinugawa, Kagami Hirabayashi, Tadashi Suga, Shingo Takada, Masashi Omokawa, Tomoyasu Kadoguchi, Masashige Takahashi, Arata Fukushima, Shouji Matsushima, Mayumi Yamato, Koichi Okita, Hiroyuki Tsutsui
AIMS/INTRODUCTION: Low aerobic capacity is a strong and independent predictor of all-cause mortality in patients with metabolic syndrome (MetS). Here, we investigated the effects of pioglitazone treatment on whole-body aerobic capacity and skeletal muscle energy metabolism in MetS patients. MATERIALS AND METHODS: Fourteen male patients with MetS received oral 15 mg/day pioglitazone for 4 months. To assess whole-body aerobic capacity, exercise testing with a bicycle ergometer was performed before and after pioglitazone treatment...
December 8, 2016: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/27929083/applicability-of-drinking-water-treatment-residue-for-lake-restoration-in-relation-to-metal-metalloid-risk-assessment
#14
Nannan Yuan, Changhui Wang, Yuansheng Pei, Helong Jiang
Drinking water treatment residue (DWTR), a byproduct generated during potable water production, exhibits a high potential for recycling to control eutrophication. However, this beneficial recycling is hampered by unclear metal/metalloid pollution risks related to DWTR. In this study, the pollution risks of Al, As, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, and Zn due to DWTR application were first evaluated for lake water based on human health risk assessment models and comparison of regulatory standards. The risks of DWTR were also evaluated for sediments on the basis of toxicity characteristics leaching procedure and fractionation in relation to risk assessment code...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27898314/effect-of-micro-aeration-and-inoculum-type-on-the-biodegradation-of-lignocellulosic-substrate
#15
P Tsapekos, P G Kougias, S A Vasileiou, G Lyberatos, I Angelidaki
The effect of various micro-aeration strategies on the anaerobic digestion (AD) of wheat straw was thoroughly examined using a mixture of inocula, containing compost and well digested sludge from biogas plant. The aim was to determine the most efficient oxygen load, pulse repetition and treatment duration, resulting in the highest methane production. The oxygen load had the largest impact on the biodegradability of straw, among the examined variables. More specifically, a micro-aeration intensity of 10mLO2/gVS was identified as the critical threshold above which the AD performance was more susceptible to instability...
February 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27871205/the-effects-of-two-different-swimming-training-periodization-on-physiological-parameters-at-various-exercise-intensities
#16
Vicente Javier Clemente-Suárez, Athanasios Dalamitros, João Ribeiro, Ana Sousa, Ricardo J Fernandes, J Paulo Vilas-Boas
This study analysed the effects of two different periodization strategies on physiological parameters at various exercise intensities in competitive swimmers. Seventeen athletes of both sexes were divided to two groups, the traditional periodization (TPG, n = 7) and the reverse periodization group (RPG, n = 10). Each group followed a 10-week training period based on the two different periodization strategies. Before and after training, swimming velocity (SV), energy expenditure (EE), energy cost (EC) and percentage of aerobic (%Aer) and anaerobic (%An) energy contribution to the swimming intensities corresponding to the aerobic threshold (AerT), the anaerobic threshold (AnT) and the velocity at maximal oxygen uptake (vVO2max) were measured...
November 21, 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27865913/tio2-uv-based-photocatalytic-pretreatment-of-wheat-straw-for-biogas-production
#17
Merlin Alvarado-Morales, Panagiotis Tsapekos, Muhammad Awais, Muhammad Gulfraz, Irini Angelidaki
The present study deals with the application of an advanced oxidation process combining UV irradiation in the presence of the photocatalyst titanium dioxide (TiO2), as an effective pretreatment method of wheat straw as means for increasing its biodegradability for increased biogas production by anaerobic digestion (AD). Especially attention was paid in oxidation of the lignin in straw, besides release the sugars from the lignocellulosic structure of straw. Specifically, four different TiO2 concentrations (0...
November 16, 2016: Anaerobe
https://www.readbyqxmd.com/read/27865723/mechanisms-of-effort-intolerance-in-patients-with-rheumatic-mitral-stenosis-combined-echocardiography-and-cardiopulmonary-stress%C3%A2-protocol
#18
Michal Laufer-Perl, Yaniv Gura, Jason Shimiaie, Jack Sherez, Gregg S Pressman, Galit Aviram, Simon Maltais, Ricki Megidish, Amir Halkin, Meirav Ingbir, Simon Biner, Gad Keren, Yan Topilsky
OBJECTIVES: This study sought to evaluate mechanisms of effort intolerance in patients with rheumatic mitral stenosis (MS). BACKGROUND: Combined stress echocardiography and cardiopulmonary testing allows assessment of cardiac function, hemodynamics, and oxygen extraction (A-Vo2 difference). METHODS: Using semirecumbent bicycle exercise, 20 patients with rheumatic MS (valve area 1.36 ± 0.4 cm(2)) were compared to 20 control subjects at 4 pre-defined activity stages (rest, unloaded, anaerobic threshold, and peak)...
November 10, 2016: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27856303/effects-of-tibetan-turnip-brassica-rapa-l-on-promoting-hypoxia-tolerance-in-healthy-humans
#19
Bingquan Chu, Chun Chen, Jiaojie Li, Xiaojian Chen, Yunhong Li, Weimin Tang, Lu Jin, Ying Zhang
ETHNOPHARMACOLOGICAL RELEVANCE: Tibetan turnip (Brassica rapa L.), widely distributed in Tibet region, is an edible and medical plant with effects of "tonic and anti-hypoxia" "heat-clearing and detoxification" and "alleviating fatigue" according to traditional Tibetan medical books. AIM OF THE STUDY: This research systematically studied the effects of Tibetan turnip on promoting hypoxia-tolerance in humans and the mechanisms. MATERIALS AND METHODS: A 7-d, self-control and single-blind human feeding trial was conducted among 27 healthy subjects with 8 males and 10 females in feeding group fed with 7...
January 4, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27848017/effects-of-a-12-week-short-interval-intermittent-low-intensity-slow-jogging-program-on-skeletal-muscle-fat-infiltration-and-fitness-in-older-adults-randomized-controlled-trial
#20
Masahiro Ikenaga, Yosuke Yamada, Yujiro Kose, Kazuhiro Morimura, Yasuki Higaki, Akira Kiyonaga, Hiroaki Tanaka
PURPOSE: We developed a short-interval, low-intensity, slow-jogging (SJ) program consisting of sets of 1 min of SJ at walking speed and 1 min of walking. We aimed to examine the effects of an easily performed SJ program on skeletal muscle, fat infiltration, and fitness in older adults. METHODS: A total of 81 community-dwelling, independent, older adults (70.8 ± 4.0 years) were randomly assigned to the SJ or control group. The SJ group participants were encouraged to perform 90 min of SJ at their anaerobic threshold (AT) intensity and 90 min of walking intermittently per week...
November 15, 2016: European Journal of Applied Physiology
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