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Aerobic threshold

Lei Liu, Jun Ma, Qiang Xue, Jingbang Shao, Yijun Chen, Gang Zeng
The optimization design of well spacing (WS) and aeration rate (AR) is crucial to the in situ aeration system operation in under long-term and high-efficiency conditions. This optimization design aims to transport additional air into landfills and to develop an improved oxygen environment for enhancing aerobic degradation. Given the specific pore structure distribution within landfills, providing sufficient oxygen in all waste bodies in field sites through gas wells is difficult. The design of well distribution also lacks adequate criteria...
March 12, 2018: Waste Management
Conor Raleigh, Bernard Donne, Neil Fleming
We compared lactate threshold (TLac ) with non-invasive markers of an aerobic-anaerobic transition; namely, ventilatory (VT) and tissue saturation index (TSIT ) thresholds. While identification of a breakpoint in blood lactate concentration ([BLa]) is common for determination of an aerobic-anaerobic transition, non-invasive measures, VT and NIRS, have also received attention as a means of determining this critical exercise intensity. We hypothesised that one or other of these non-invasive measures would have a strong association with TLac ...
2018: International Journal of Exercise Science
Leandro C Felippe, Guilherme A Ferreira, Fernando De-Oliveira, Flavio O Pires, Adriano E Lima-Silva
Objective: The purpose of this study was to investigate the difference between arterialized and venous blood lactate concentrations [La] during constant-load exercises at different intensities. Methods: Fifteen physically active men cycled for 30 minutes (or until exhaustion) at the first lactate threshold (LT1 ), at 50% of the difference between the first and second lactate threshold (TT50% ), at the second lactate threshold (LT2 ), and at 25% of the difference between LT2 and maximal aerobic power output (TW25% )...
June 2017: Journal of Exercise Science and Fitness
Eleni C Pappa, Thomas G Bontinis, Maria Tasioula-Margari, John Samelis
The microbiological quality of and changes in the main physicochemical parameters, together with the evolution of proteolysis, lipolysis and volatile profiles of soft Xinotyri, a traditional Greek acid-curd cheese (pH≈4.4, moisture 65%, salt 1%) made from raw (RMC) or pasteurized (PMC) goat's milk without starters, were evaluated during aerobic storage at 4o C for 60 days. No statistically significant differences between the total nitrogen (TN) and nitrogen fraction (% of TN) contents, the degradation of intact αs - or β-caseins, total free amino acid (FAA) contents, and the ratio of hydrophilic and hydrophobic peptides in the water-soluble fraction of RMC and PMC were found...
December 2017: Food Technology and Biotechnology
Pedro B Junior, Vitor L de Andrade, Eduardo Z Campos, Carlos A Kalva-Filho, Alessandro M Zagatto, Gustavo G de Araújo, Marcelo Papoti
Due to the controversy about the sensitive of lactate minimum intensity (LMI) to training and the need to develop other tool for aerobic fitness evaluation, the purpose of this study was to analyze the sensitivity of glucose minimum intensity (GMI) and LMI to endurance training. Eight trained male cyclists (21.4 ± 1.9 years, 67.6 ± 7.5 kg and 1.72 ± 0.10 m) were evaluated twice, before and after 12 weeks of training. GMI and LMI were calculated, respectively, by the lowest blood glucose and lactate values attained during an incremental test performed after a hyperlactemia induction, and VO2 max was determined during standard incremental effort...
March 2018: Journal of Sports Science & Medicine
Jaelson G Ortiz, Juliano F da Silva, Lorival J Carminatti, Luiz G A Guglielmo, Fernando Diefenthaeler
This study aims to analyze the physiological, neuromuscular, and biochemical responses in untrained women after eight weeks of regular participation in small-sided soccer games compared to aerobic training. Twenty-seven healthy untrained women were divided into two groups [soccer group (SG = 17) and running group (RG = 10)]. Both groups trained three times per week for eight weeks. The variables measured in this study were maximal oxygen uptake (VO2 max), relative velocity at VO2 max (vVO2 max), peak velocity, relative intensity at lactate threshold (vLT), relative intensity at onset of blood lactate accumulation (vOBLA), peak force, total cholesterol, HDL, LDL, triglycerides, and cholesterol ratio (LDL/HDL)...
March 2018: Journal of Sports Science & Medicine
Rasmus Stilling Tougaard, Esben Søvsø Szocska Hansen, Christoffer Laustsen, Jakob Lindhardt, Marie Schroeder, Hans Erik Bøtker, Won Yong Kim, Henrik Wiggers, Hans Stødkilde-Jørgensen
PURPOSE: Deranged metabolism is now recognized as a key causal factor in a variety of heart diseases, and is being studied extensively. However, invasive methods may alter metabolism, and conventional imaging techniques measure tracer uptake but not downstream metabolism. These challenges may be overcome by hyperpolarized MR, a noninvasive technique currently crossing the threshold into human trials. The aim of this study was to image metabolic changes in the heart in response to endogastric glucose bolus and to acute hypertension...
March 9, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Nele Pattyn, Randy Beulque, Véronique Cornelissen
BACKGROUND: In a previous meta-analysis including nine trials comparing aerobic interval training with aerobic continuous training in patients with coronary artery disease, we found a significant difference in peak oxygen uptake favoring aerobic interval training. OBJECTIVE: The objective of this study was to (1) update the original meta-analysis focussing on peak oxygen uptake and (2) evaluate the effect on secondary outcomes. METHODS: We conducted a systematic review with a meta-analysis by searching PubMed and SPORTDiscus databases up to March 2017...
March 3, 2018: Sports Medicine
Edwina Romanens, Rebecca Näf, Tobias Lobmaier, Vasilisa Pedan, Susette Freimüller Leischtfeld, Leo Meile, Susanne Miescher Schwenninger
Lab-scale systems modelling the spontaneous cocoa bean fermentation process are useful tools to research the influence of process parameters on the fermentation and the final bean quality. In this study in Honduras, a 1-kg lab-scale fermentation (LS-F) was compared to a 300-kg on-farm fermentation (OF-F) in a multiphasic approach, analysing microbial counts, microbial species diversity, physico-chemical parameters, and final dried bean quality. Yeast and total aerobic counts of up to 8 log CFU/g during the LS-F were comparable to the OF-F, while counts for lactic acid bacteria and acetic acid bacteria were up to 3 log CFU/g lower during the LS-F than during the OF-F...
February 28, 2018: Applied Microbiology and Biotechnology
Mariana Ribeiro Silva, Cristine Lima Alberton, Elisa Gouvêa Portella, Gabriela Neves Nunes, Daniela Gomez Martin, Stephanie Santana Pinto
This study aimed to investigate the effects of two water-based training programs (aerobic and combined) and a non-periodized physical activity program on functional capacity and quality of life (QoL) of elderly women. Forty-one elderly female volunteers (65 ± 4 years) were divided into three groups: aerobic training group (WBA, n = 13), combined training (sequence: resistance/aerobic; WBC; n = 11) and a control group of non-periodized physical activity program (CG, n = 9). The participants performed the water-based trainings twice a week for 12 weeks...
February 21, 2018: Experimental Gerontology
Sarah Beck, Matthew A Wyon, Emma Redding
Beck, S, Wyon, MA, and Redding, E. Changes in energy demand of dance activity and cardiorespiratory fitness during 1 year of vocational contemporary dance training. J Strength Cond Res 32(3): 841-848, 2018-Previous literature has demonstrated that the intensity of dance class as well as its discontinuous nature is not sufficient to elicit an aerobic training response and that the aerobic capacity of dancers is relatively low. These findings have raised questions on the suitability of training, through class and rehearsal, as adequate preparation for the physical demands of performance and a sustained, successful career in dance...
March 2018: Journal of Strength and Conditioning Research
Mohinder Pal, Munesh Kumari, Shashi Kiran, Richa Salwan, Shanmugam Mayilraj, Sanjay Chhibber, Arvind Gulati
A novel bacterial strain, IHBB 10212T , of the genus Chryseobacterium was isolated from a glacier near the Kunzum Pass located in the Lahaul-Spiti in the North-Western Himalayas of India. The cells were Gram-negative, aerobic, non-sporulating, single rods, lacked flagella, and formed yellow to orange pigmented colonies. The strain utilized maltose, trehalose, sucrose, gentibiose, glucose, mannose, fructose, mannitol, arabitol and salicin for growth. Flexirubin-type pigments were produced by strain IHBB 10212T ...
January 29, 2018: International Journal of Systematic and Evolutionary Microbiology
Dhiraj Kumar Chaudhary, Jaisoo Kim
A yellow-coloured, Gram-stain-negative, non-motile, aerobic and rod-shaped bacterium, designated strain Ktm-2T , was isolated from oil-contaminated soil. Strain Ktm-2T was able to grow at 15 to 40 °C, pH 4.5-10.0 and 0-2 % (w/v) NaCl concentration. This strain was taxonomically characterized by a polyphasic approach. Based on the 16S rRNA gene sequence analysis, strain Ktm-2T represented a member of the genus Chitinophaga and shared highest sequence similarity with Chitinophaga barathri YLT18T (98.1 %), Chitinophaga cymbidii R156-2T (96...
January 16, 2018: International Journal of Systematic and Evolutionary Microbiology
Megumi Sumizono, Harutoshi Sakakima, Shotaro Otsuka, Takuto Terashi, Kazuki Nakanishi, Koki Ueda, Seiya Takada, Kiyoshi Kikuchi
Background: Exercise regimens are established methods that can relieve neuropathic pain. However, the relationship between frequency and intensity of exercise and multiple cellular responses of exercise-induced alleviation of neuropathic pain is still unclear. We examined the influence of exercise frequency on neuropathic pain and the intracellular responses in a sciatic nerve chronic constriction injury (CCI) model. Materials and methods: Rats were assigned to four groups as follows: CCI and high-frequency exercise (HFE group), CCI and low-frequency exercise (LFE group), CCI and no exercise (No-Ex group), and naive animals (control group)...
2018: Journal of Pain Research
Julio Cesar Silva de Sousa, Camila Torriani-Pasin, Amanda Barboza Tosi, Rafael Yokoyama Fecchio, Luiz Augusto Riani da Costa, Cláudia Lúcia de Moraes Forjaz
OBJECTIVE: To evaluate whether virtual reality games (VRG) in stroke survivors produce significant and reproducible heart rate (HR) and oxygen consumption (VO2) responses during their execution, corresponding to an intensity between the anaerobic threshold (AT) and the respiratory compensation point (RCP). DESIGN: Single subjects repeated measure design SETTING: Stroke survivors registered from a rehabilitation program PARTICIPANTS: Twelve chronic hemiparetic stroke survivors (10 men, 58 ± 12 years) rated at 3 or 4 in the Functional Ambulation Categories (FAC)...
February 8, 2018: Archives of Physical Medicine and Rehabilitation
Henrik Bjarke Vaegter, Daniel Bandholtz Dørge, Kristian Sonne Schmidt, Anders Haagen Jensen, Thomas Graven-Nielsen
Objective: Exercise increases pressure pain thresholds (PPTs) in exercising and nonexercising muscles, known as exercise-induced hypoalgesia (EIH). No studies have investigated the test-retest reliability of change in PPTs after aerobic exercise. Primary objectives were to compare the effect on PPTs after an incremental bicycling exercise compared with quiet rest and to investigate the relative and absolute test-retest reliability of the test stimulus (PPT) and the absolute and relative EIH response in exercising and nonexercising muscles...
February 7, 2018: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
Wiebke Jansen, Svenja Woudstra, Anja Müller, Nils Grabowski, Gundela Schoo, Bettina Gerulat, Günter Klein, Corinna Kehrenberg
Though imports of products of animal origin into the European Union (EU) have to comply with legal requirements and quality standards of the community, food consignment rejections at external EU borders have been increasing in recent years. This study explored microbiological metrics according to national target and critical values valid for samples at consumer level of 498 fresh poultry meat and 136 fresh pork filets from consignments subjected to physical checks during clearing at the border inspection post Hamburg harbour between January 2014 and December 2015 with ISO standard methods...
2018: PloS One
Gustavo Zaccaria Schaun, Stephanie Santana Pinto, Aline Borges de Carvalho Praia, Cristine Lima Alberton
The present study compared the energy expenditure (EE) during and after two water aerobics protocols, high-intensity interval training (HIIT) and moderate continuous training (CONT). A crossover randomized design was employed comprising 11 healthy young women. HIIT consisted of eight 20s bouts at 130% of the cadence associated with the maximal oxygen consumption (measured in the aquatic environment) with 10s passive rest. CONT corresponded to 30 min at a heart rate equivalent to 90-95% of the second ventilatory threshold...
February 5, 2018: Journal of Sports Sciences
Hayden Winter, Elena Christopher-Allison, Anna L Brown, Andrea Mitchell Goforth
Herein, we report an aerobic synthesis method to produce bismuth nanoparticles (Bi NPs) with average diameters in the range 40-80 nm using commercially available bismuth triiodide (BiI<sub>3</sub>) as starting material; the method uses only readily available chemicals and conventional laboratory equipment. Furthermore, size data from replicates of the synthesis under standard reaction conditions indicate that this method is highly reproducible in achieving Bi NP populations with low standard deviations in the mean diameters...
February 2, 2018: Nanotechnology
Zheng-Fei Yan, Pei Lin, Kyung-Hwa Won, Chang-Tian Li, GyungSoo Park, ByungSun Chin, MooChang Kook, Qi-Jun Wang, Tae-Hoo Yi
A Gram-stain-negative, aerobic, non-motile, rod-shaped, catalase-positive and oxidase-positive bacteria (THG-T61T), was isolated from rhizosphere of Hibiscus syriacus. Growth occurred at 10-37 °C (optimum 25-30 °C), at pH 5.0-9.0 (optimum 7.0) and in the presence of 0-2.0 % NaCl (optimum without NaCl supplement). Based on 16S rRNA gene sequence analysis, the nearest phylogenetic neighbours of strain THG-T61T were identified as Sphingomonas ginsengisoli KCTC 12630T (97.9 %), Sphingomonas jaspsi DSM 18422T (97...
February 2018: International Journal of Systematic and Evolutionary Microbiology
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