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Aerobic threshold

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https://www.readbyqxmd.com/read/27930876/pioglitazone-on-improves-whole-body-aerobic-capacity-and-skeletal-muscle-energy-metabolism-in-patients-with-metabolic-syndrome
#1
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/27928204/a-feasibility-study-related-to-inactive-cancer-survivors-compared-with-non-cancer-controls-during-aerobic-exercise-training
#2
Scott N Drum, Riggs J Klika, Susan D Carter, Lisa K Sprod, Lars Donath
Cancer survivors (CA) tend to demonstrate metabolic, cardiac, and ventilatory alterations due to previous chemotherapy and radiation that may impair adaptability following aerobic exercise training. Exercise training adaptations of CA finished with primary treatment compared to non-cancer participants (NC) have not yet been extensively elucidated. Thus, the present study compared physiologic responses of CA versus NC following a low-to-moderate intensity, 8-wk aerobic training program. Thirty-seven previously sedentary participants (CA: n = 14, 12 females; NC: n = 23, 19 females) with no heart or metabolic disease did not differ in age, height, weight, and body mass index (51 ± 2 y, 1...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27918679/movement-patterns-and-metabolic-responses-during-an-international-rugby-sevens-tournament
#3
Anthony Couderc, Claire Thomas, Mathieu Lacome, Julien Piscione, Julien Robineau, Rémi Delfour-Peyrethon, Rachel Borne, Christine Hanon
PURPOSE: This study investigated the running-demands and associated metabolic perturbations during an official rugby sevens tournament. METHODS: Twelve elite players participated in seven matches wearing Global Positioning System units. Maximal sprinting speed (MSS) and maximal aerobic speed (MAS) were measured. High-intensity threshold was individualized relative to MAS (>100% of MAS) and very high-intensity distance were reported relative to both MAS and MSS...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27902257/acinetobacter-larvae-sp-nov-isolated-from-the-larval-gut-of-omphisa-fuscidentalis
#4
Song Liu, Yanwei Wang, Zhiyong Ruan, Kedong Ma, Bo Wu, Yansheng Xu, Jingli Wang, Yang You, Mingxiong He, Guoquan Hu
A Gram-stain-negative, non-spore-forming, non-motile, and aerobic coccobacilli shaped strain, designated BRTC-1T, was isolated from the gut of Omphisa fuscidentalis Hampson, which is a larva of a moth and was collected from Xishuangbanna Dai Autonomous Prefecture in China. The isolate was found to grow at NaCl concentrations of 0-5 % (w/v) (optimum: 0 %), 10-45 ℃ (optimum: 30-35 ℃) and pH 5.0-9.0 (optimum: 6.0) on TSA. Analysis of the 16S rRNA gene sequence indicated that the isolate belongs to the genus Acinetobacter and most closely related to Acinetobacter rudis LMG 26107T, Acinetobacter guillouiae LMG 988T and Acinetobacter bereziniae LMG 1003T with 96...
November 8, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27902223/bacillus-capparidis-sp-nov-a-novel-endophytic-bacterium-isolated-from-roots-of-capparis-spinosa-l
#5
Hong-Fei Wang, Qiu-Li Li, Yong-Guang Zhang, Min Xiao, Xing-Kui Zhou, Jian-Wei Guo, Yan-Qing Duan, Wen-Jun Li
A novel endophytic bacterium, designated strain EGI 6500252T, was isolated from the surface-sterilized roots of medicinal plant (Capparis spinosa L.) collected from Urumqi city, Xinjiang, north-west of China. Cells were Gram-staining-positive, non-motile, aerobic, catalase- and oxidase-positive, rod-shaped and did not display spore formation. Strain EGI 6500252T grew at 10-40 °C (optimum 25-30 °C) and pH 6.0-8.0 (optimum pH 7.0), and in the presence of 0-10 % NaCl (w/v) (optimum 0-3 %). The major cellular fatty acids (> 10 %) were identified as iso-C15:0, anteiso-C15:0, anteiso-C17:0 and Sum In feature 4...
October 26, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27871205/the-effects-of-two-different-swimming-training-periodization-on-physiological-parameters-at-various-exercise-intensities
#6
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/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
#7
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
https://www.readbyqxmd.com/read/27837190/hyperoxia-results-in-increased-aerobic-metabolism-following-acute-brain-injury
#8
Arnab Ghosh, David Highton, Christina Kolyva, Ilias Tachtsidis, Clare E Elwell, Martin Smith
Acute brain injury is associated with depressed aerobic metabolism. Below a critical mitochondrial pO2 cytochrome c oxidase, the terminal electron acceptor in the mitochondrial respiratory chain, fails to sustain oxidative phosphorylation. After acute brain injury, this ischaemic threshold might be shifted into apparently normal levels of tissue oxygenation. We investigated the oxygen dependency of aerobic metabolism in 16 acutely brain-injured patients using a 120-min normobaric hyperoxia challenge in the acute phase (24-72 h) post-injury and multimodal neuromonitoring, including transcranial Doppler ultrasound-measured cerebral blood flow velocity, cerebral microdialysis-derived lactate-pyruvate ratio (LPR), brain tissue pO2 (pbrO2), and tissue oxygenation index and cytochrome c oxidase oxidation state (oxCCO) measured using broadband spectroscopy...
November 11, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27832671/exercise-based-cardiac-rehabilitation-in-coronary-disease-training-impulse-or-modalities
#9
P-M Leprêtre, M Ghannem, M Bulvestre, S Ahmaidi, S Delanaud, T Weissland, P Lopes
To compare the effects of 2 short programs with similar training load (TL), based on combined aerobic - resistance training (CT) or aerobic training (AT) on cardiorespiratory responses, 32 patients with coronary heart disease (CHD: 63.8±8.0y, 1.73±0.06 m, 84.8±15.9 kg, Left Ventricular Ejection Fraction: 0.53±0.8) performed 4 weeks of exercise rehabilitation based on CT (n=16) or AT (n=16). Maximal tolerated power (MTP), peak values of oxygen uptake (VO2peak) and heart rate (HRpeak), anaerobic threshold (VT1) were determined during an incremental cycling exercise test before and after training periods...
November 10, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27810297/small-unrepaired-ventricular-septal-defects-reveal-poor-exercise-capacity-compared-with-healthy-peers-a-prospective-cohort-study
#10
Marie Maagaard, Johan Heiberg, Vibeke E Hjortdal
BACKGROUND: Small ventricular septal defects (VSDs) are considered to be without hemodynamic influence and most remain unrepaired. However, studies recently described late cardiac adverse consequences that could potentially affect functional capacity. Yet, this has never been assessed in adulthood. Therefore, the aim was to determine peak exercise capacity in adults with small VSDs compared with healthy, matched controls. METHODS: In a prospective, cohort study we included patients with unrepaired VSDs and healthy controls, (age 18 to 40years)...
October 29, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27810293/usefulness-of-stroke-volume-monitoring-during-upright-ramp-incremental-cycle-exercise-in-young-patients-with-fontan-circulation
#11
Antoine Legendre, Aurore Guillot, Magalie Ladouceur, Damien Bonnet
BACKGROUND: Aerobic capacity (VO2 max) of patients with Fontan circulation (FC) is lowest within patients with congenital heart disease. The reasons have not been completely elucidated. METHODS: Twenty five young patients with non-failing FC underwent a cardiopulmonary test during an upright ramp cycling. By using a signal morphology impedance cardiography device (physioflow®), stroke volume (SV) was evaluated along with effort. The results were compared with paired healthy controls...
October 29, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27803354/high-mid-flow-to-vital-capacity-ratio-and-the-response-to-exercise-in-children-with-congenital-heart-disease
#12
Daphna Vilozni, Maria Rosario Alcaneses-Ofek, Ronen Reuveny, Omer Rosenblum, Omri Inbar, Uriel Katz, Tomer Ziv-Baran, Gal Dubnov-Raz
BACKGROUND: Pulmonary mechanics may play a role in exercise intolerance in patients with congenital heart disease (CHD). A reduced FVC volume could increase the ratio between mid-flow (FEF25-75%) and FVC, which is termed high dysanapsis. The relationship between high dysanapsis and the response to maximum-intensity exercise in children with CHD had not yet been studied. The aim of this work was to examine whether high dysanapsis is related to the cardiopulmonary response to maximum-intensity exercise in pediatric subjects with CHD...
December 2016: Respiratory Care
https://www.readbyqxmd.com/read/27790157/influence-of-time-of-day-on-maximal-exercise-capacity-is-related-to-daily-thermal-balance-but-not-to-induced-neuronal-activity-in-rats
#13
Frederico S M Machado, Daniela R C Fóscolo, Maristela O Poletini, Cândido C Coimbra
In the present study, we investigated whether the daily fluctuations of internal body temperature (Tb) and spontaneous locomotor activity (SLA) interact with the thermal and neuronal adjustments induced by high-intensity aerobic exercise until fatigue. The body temperature and SLA of adult Wistar rats (n = 23) were continuously recorded by telemetry for 48 h. Then, the rats were subjected to a protocol of graded exercise until fatigue or rest on the treadmill during light and dark-phases. Tb, tail skin temperature and ambient temperature during each experimental session were recorded...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27790156/locomotor-muscle-fatigue-does-not-alter-oxygen-uptake-kinetics-during-high-intensity-exercise
#14
James G Hopker, Giuseppe Caporaso, Andrea Azzalin, Roger Carpenter, Samuele M Marcora
The [Formula: see text] slow component ([Formula: see text]) that develops during high-intensity aerobic exercise is thought to be strongly associated with locomotor muscle fatigue. We sought to experimentally test this hypothesis by pre-fatiguing the locomotor muscles used during subsequent high-intensity cycling exercise. Over two separate visits, eight healthy male participants were asked to either perform a non-metabolically stressful 100 intermittent drop-jumps protocol (pre-fatigue condition) or rest for 33 min (control condition) according to a random and counterbalanced order...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27784578/study-and-assessment-of-segregated-biowaste-composting-the-case-study-of-attica-municipalities
#15
D Malamis, A Bourka, Ε Stamatopoulou, K Moustakas, O Skiadi, M Loizidou
This work aims to assess the operation of the first large scale segregated biowaste composting scheme in Greece to divert Household Food Waste (HFW) from landfill and produce a material which can be recovered and used as compost. The source separation and collection of HFW was deployed in selected areas in Attica Region serving about 3700 households. Sorted HFW is collected & transported to the Mechanical and Biological Treatment (MBT) plant in Attica Region that has been designed to produce Compost Like Output (CLO) from mixed MSW...
October 23, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27753997/ed-07-2-to-lift-walk-or-run-what-is-the-optimal-mode-of-exercise-to-reduce-hypertension-and-prevent-cardiovascular-disease
#16
Peter Kokkinos
A plethora of evidence exists supporting that structured aerobic exercise or activities that increase cardiorespiratory fitness (CRF) lower resting blood pressure (BP) in patients with hypertension (HTN). Relatively few studies have assessed the effects of anaerobic or resistance exercise on BP. Thus, its role in managing HTN is not defined. Also, possible risks related with exercise in hypertensive patients have not been adequately addressed.In addition to lowering BP, CRF attenuates the incidence of HTN. A substantial part of the age-related progression to HTN is not an inevitable outcome of aging as once thought, but a consequence of lifestyle characterized by high-fat/salt diets and physical inactivity...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27746769/the-evolving-role-of-coliforms-as-indicators-of-unhygienic-processing-conditions-in-dairy-foods
#17
Nicole H Martin, Aljoša Trmčić, Tsung-Han Hsieh, Kathryn J Boor, Martin Wiedmann
Testing for coliforms has a long history in the dairy industry and has helped to identify raw milk and dairy products that may have been exposed to unsanitary conditions. Coliform standards are included in a number of regulatory documents (e.g., the U.S. Food and Drug Administration's Grade "A" Pasteurized Milk Ordinance). As a consequence, detection above a threshold of members of this method-defined, but diverse, group of bacteria can result in a wide range of regulatory outcomes. Coliforms are defined as aerobic or facultatively anaerobic, Gram negative, non-sporeforming rods capable of fermenting lactose to produce gas and acid within 48 h at 32-35°C; 19 genera currently include at least some strains that represent coliforms...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27742804/influence-of-training-intensity-on-adaptations-in-acid-base-transport-proteins-muscle-buffer-capacity-and-repeated-sprint-ability-in-active-men
#18
Cian McGinley, David J Bishop
McGinley C, Bishop DJ. Influence of training intensity on adaptations in acid/base transport proteins, muscle buffer capacity, and repeated-sprint ability in active men. J Appl Physiol 121: 1290-1305, 2016. First published October 14, 2016; doi:10.1152/japplphysiol.00630.2016-This study measured the adaptive response to exercise training for each of the acid-base transport protein families, including providing isoform-specific evidence for the monocarboxylate transporter (MCT)1/4 chaperone protein basigin and for the electrogenic sodium-bicarbonate cotransporter (NBCe)1...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27712194/exercise-induced-hypoalgesia-pain-tolerance-preference-and-tolerance-for-exercise-intensity-and-physiological-correlates-following-dynamic-circuit-resistance-exercise
#19
Brandon A Baiamonte, Robert R Kraemer, Chelsea N Chabreck, Matthew L Reynolds, Kayla M McCaleb, Georgia L Shaheen, Daniel B Hollander
Previous research has demonstrated significant decreases in pain perception in healthy individuals following both aerobic and upper body resistance exercise, but research on circuit training has been limited. The purpose of the study was to determine the effects of a strenuous bout of dynamic circuit resistance exercise on pain threshold and pain tolerance in conjunction with changes in blood lactate levels, heart rate (HR), and perceived exertion. A sample of 24 college-age students participated in 2 sessions: (1) a maximal strength testing session and (2) a circuit training bout of exercise that consisted of 3 sets of 12 repetitions with a 1:1 work to rest ratio at 60% one-repetition maximum (1-RM) predicted from a three-repetition maximum (3-RM) for 9 exercises...
October 7, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27687561/estimating-oxygen-uptake-and-energy-expenditure-during-treadmill-walking-by-neural-network-analysis-of-easy-to-obtain-inputs
#20
Thomas Beltrame, Robert Amelard, Rodrigo Villar, Mohammad Javad Shafiee, Alexander Wong, Richard L Hughson
The study of oxygen uptake (VO2) dynamics during walking exercise transitions adds valuable information regarding fitness level and energy expenditure. However, direct VO2 measurements are not applicable for measurements in the general population under realistic settings. Devices to measure VO2 are associated with elevated cost, uncomfortable use of a mask, need of trained technicians and impossibility of long-term data collection. The objective of this study was to predict the VO2 dynamics from heart rate and inputs from the treadmill ergometer by a novel artificial neural network approach...
September 29, 2016: Journal of Applied Physiology
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