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Energy cost of running

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https://www.readbyqxmd.com/read/29315164/effects-of-strength-training-on-postpubertal-adolescent-distance-runners
#1
Richard C Blagrove, Louis P Howe, Emily J Cushion, Adam Spence, Glyn Howatson, Charles R Pedlar, Philip R Hayes
PURPOSE: Strength training activities have consistently been shown to improve running economy (RE) and neuromuscular characteristics, such as force producing ability and maximal speed, in adult distance runners. However the effects on adolescent (<18 years) runners remains elusive. This randomized control trial aimed to examine the effect of strength training on several important physiological and neuromuscular qualities associated with distance running performance. METHODS: Participants (n=25, 13 female, 17...
January 8, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29287284/potential-relationship-between-passive-plantar-flexor-stiffness-and-running-performance
#2
Hiromasa Ueno, Tadashi Suga, Kenji Takao, Takahiro Tanaka, Jun Misaki, Yuto Miyake, Akinori Nagano, Tadao Isaka
The present study aimed to determine the relationship between passive stiffness of the plantar flexors and running performance in endurance runners. Forty-eight well-trained male endurance runners and 24 untrained male control subjects participated in this study. Plantar flexor stiffness during passive dorsiflexion was calculated from the slope of the linear portion of the torque-angle curve. Of the endurance runners included in the present study, running economy in 28 endurance runners was evaluated by measuring energy cost during three 4-min trials (14, 16, and 18 km/h) of submaximal treadmill running...
December 29, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29280950/mixed-h%C3%A2-h%C3%A2-based-fusion-estimation-for-energy-limited-multi-sensors-in-wearable-body-networks
#3
Chao Li, Zhenjiang Zhang, Han-Chieh Chao
In wireless sensor networks, sensor nodes collect plenty of data for each time period. If all of data are transmitted to a Fusion Center (FC), the power of sensor node would run out rapidly. On the other hand, the data also needs a filter to remove the noise. Therefore, an efficient fusion estimation model, which can save the energy of the sensor nodes while maintaining higher accuracy, is needed. This paper proposes a novel mixed H₂/H∞-based energy-efficient fusion estimation model (MHEEFE) for energy-limited Wearable Body Networks...
December 27, 2017: Sensors
https://www.readbyqxmd.com/read/29278499/bim-binding-remotely-regulates-bax-activation-insights-from-the-free-energy-landscapes
#4
Souvik Sinha, Atanu Maity, Shubhra Ghosh Dastidar
Activation of the pro-apoptotic BAX protein, a BCl-2 family member, is known to trigger the apoptosis by forming pores in the mitochondrial outer membrane (MOM). While in the cytosol, release of its transmembrane C-terminal helix (called α9 helix) from a well-characterized binding pocket (BC groove) and subsequent permeabilization of MOM is understood to be the initiating events of the activation. In concern of what initiates the BAX activation, so far one plausible suggestion has been that the transient attachment of BH3-only peptide on a distal site from BC groove triggers the activation process...
December 26, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/29259560/the-energetics-during-the-world-s-most-challenging-mountain-ultra-marathon-a-case-study-at-the-tor-des-geants%C3%A2
#5
Aldo Savoldelli, Alessandro Fornasiero, Pietro Trabucchi, Eloisa Limonta, Antonio La Torre, Francis Degache, Barbara Pellegrini, Grégoire P Millet, Gianluca Vernillo, Federico Schena
Purpose: To provide insights into the energy requirements as well as the physiological adaptations of an experienced 50-year-old ultra-marathon male athlete during the world's most challenging mountain ultra-marathon (MUM). Methods: The international race supporting the study was the Tor des Geants®, characterized by 330 km with +24,000 m D+ to be covered within 150 h. Before the MUM, we assessed the peak oxygen uptake ([Formula: see text]) by means of an incremental graded running test. During the MUM we monitored six ascents (once per race day) with a portable gas analyzer, a GPS and a finger pulse oximeter...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29245074/fabrication-characterization-and-photoelectrochemical-activity-of-tungsten-copper-co-sensitized-tio2-nanotube-composite-photoanodes
#6
Mohamad Mohsen Momeni, Yousef Ghayeb, Farzaneh Ezati
Tungsten-copper co-sensitized TiO2 nanotube films on titanium substrate, used as photoanodes in photoelectrochemical (PEC) water splitting to produce hydrogen, have been synthesized via anodization and chemical bath deposition (CBD) methods. Field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) were used to study the morphology and elemental composition of the synthetic samples. UV-Vis diffuse reflection spectroscopy (UV-Vis DRS) was sued to investigate the optical features of the samples...
December 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29185777/systematic-testing-of-belief-propagation-estimates-for-absolute-free-energies-in-atomistic-peptides-and-proteins
#7
Rory M Donovan-Maiye, Christopher J Langmead, Daniel Zuckerman
Motivated by the extremely high computing costs associated with estimates of free energies for biological systems using molecular simulations, we further the exploration of existing ``belief propagation'' (BP) algorithms for fixed-backbone peptide and protein systems. The pre-calculation of pairwise interactions among discretized libraries of side chain conformations, along with representation of protein side chains as nodes in a graphical model, enables direct application of the BP approach, which requires only $\sim$1 s of single-processor run time after the pre-calculation stage...
November 29, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29182895/efficacy-of-downhill-running-training-for-improving-muscular-and-aerobic-performances
#8
Junichi Toyomura, Hisashi Mori, Kota Tayashiki, Masayoshi Yamamoto, Hiroaki Kanehisa, Sumiaki Maeo
This study investigated effects of downhill (DR) versus level (LR) running training on various muscular and aerobic performances. Eighteen healthy young males conducted either DR (DR group [DRG], n = 10: -10% slope) or LR (LR group [LRG], n = 8) training at a target heart rate (HR) associated with lactate threshold (LT) for 20 min·session<sup>-1</sup>, 3 sessions·week<sup>-1</sup>, for 5 weeks. Before and after the interventions, the following variables were measured: knee extension torque (-150, -30, 0, 30, 150°·s<sup>-1</sup>), leg extension power (simultaneous hip and knee extension: 0...
November 28, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29096505/the-biofragment-database-bfdb-an-open-data-platform-for-computational-chemistry-analysis-of-noncovalent-interactions
#9
Lori A Burns, John C Faver, Zheng Zheng, Michael S Marshall, Daniel G A Smith, Kenno Vanommeslaeghe, Alexander D MacKerell, Kenneth M Merz, C David Sherrill
Accurate potential energy models are necessary for reliable atomistic simulations of chemical phenomena. In the realm of biomolecular modeling, large systems like proteins comprise very many noncovalent interactions (NCIs) that can contribute to the protein's stability and structure. This work presents two high-quality chemical databases of common fragment interactions in biomolecular systems as extracted from high-resolution Protein DataBank crystal structures: 3380 sidechain-sidechain interactions and 100 backbone-backbone interactions that inaugurate the BioFragment Database (BFDb)...
October 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29073470/comparative-assessment-of-ceramic-media-for-drinking-water-biofiltration
#10
Dikshant Sharma, Liz Taylor-Edmonds, Robert C Andrews
Media type is a critical design consideration when implementing biofiltration for drinking water treatment. Granular activated carbon (GAC) has been shown to provide superior performance when compared to a wide range of media types, largely due to its higher surface area. Engineered ceramic media is an attractive alternative to GAC as it has a similar surface area but at a lower cost. This pilot-scale biofiltration study compared the performance of GAC, anthracite and two different effective sizes of ceramic (CER) media (1...
October 13, 2017: Water Research
https://www.readbyqxmd.com/read/29040432/machine-learning-accelerates-md-based-binding-pose-prediction-between-ligands-and-proteins
#11
Kei Terayama, Hiroaki Iwata, Mitsugu Araki, Yasushi Okuno, Koji Tsuda
Motivation: Fast and accurate prediction of protein-ligand binding structures is indispensable for structure-based drug design (SBDD) and accurate estimation of binding free energy of drug candidate molecules in drug discovery. Recently, accurate pose prediction methods based on short-MD simulations such as MM-PBSA and MM-GBSA among generated docking poses have been used. Since molecular structures obtained from MD simulation depends on the initial condition, taking the average over different initial conditions leads to better accuracy...
October 11, 2017: Bioinformatics
https://www.readbyqxmd.com/read/29038746/influence-of-exercise-duration-on-cardiorespiratory-responses-energy-cost-and-tissue-oxygenation-within-a-6-hour-treadmill-run
#12
Hugo A Kerhervé, Scott McLean, Karen Birkenhead, David Parr, Colin Solomon
PURPOSE: The physiological mechanisms for alterations in oxygen utilization ([Formula: see text]) and the energy cost of running (Cr ) during prolonged running are not completely understood, and could be linked with alterations in muscle and cerebral tissue oxygenation. METHODS: Eight trained ultramarathon runners (three women; mean ± SD; age 37 ± 7 yr; maximum [Formula: see text] 60 ± 15 mL min(-1) kg(-1)) completed a 6 hr treadmill run (6TR), which consisted of four modules, including periods of moderate (3 min at 10 km h(-1), 10-CR) and heavy exercise intensities (6 min at 70% of maximum [Formula: see text], HILL), separated by three, 100 min periods of self-paced running (SP)...
2017: PeerJ
https://www.readbyqxmd.com/read/28980361/a-low-cost-neutral-zinc-iron-flow-battery-with-high-energy-density-for-stationary-energy-storage
#13
Congxin Xie, Yinqi Duan, Wenbin Xu, Huamin Zhang, Xianfeng Li
Flow batteries (FBs) are one of the most promising stationary energy-storage devices for storing renewable energy. However, commercial progress of FBs is limited by their high cost and low energy density. A neutral zinc-iron FB with very low cost and high energy density is presented. By using highly soluble FeCl2 /ZnBr2 species, a charge energy density of 56.30 Wh L(-1) can be achieved. DFT calculations demonstrated that glycine can combine with iron to suppress hydrolysis and crossover of Fe(3+) /Fe(2+) ...
October 5, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28966714/run-economy-on-a-normal-and-lower-body-positive-pressure-treadmill
#14
Corey Temple, Erik Lind, Deborah VAN Langen, Larissa True, Saige Hupman, James F Hokanson
Lower body positive pressure (LBPP) treadmill running is used more frequently in clinical and athletic settings. Accurate caloric expenditure is required for proper exercise prescription, especially for obese patients performing LBPP exercise. It is unclear if running on LBPP changes running economy (RE) in proportion to the changes in body weight. The purpose of the study was to measure the oxygen consumption (VO2) and running economy (RE) of treadmill running at normal body weight and on LBPP. Twenty-three active, non-obese participants (25...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28950400/standardized-met-value-underestimates-the-energy-cost-of-treadmill-running-in-men
#15
Helouane M Ázara, Paulo T V Farinatti, Adrian W Midgley, Fabrício Vasconcellos, Patrícia Vigário, Felipe A Cunha
The main purpose of the present study was to compare the reference metabolic equivalent (MET) value and observed resting oxygen uptake (VO2) for defining cardiorespiratory fitness (VO2max) and characterizing the energy cost of treadmill running. A heterogeneous cohort of 114 healthy men volunteered to participate. In Part 1 of the study, 114 men [mean±SD, age: 24±5 years; height: 177.1±7.9 cm; body mass: 75.0±10.0 kg] visited the laboratory twice for assessment of resting and maximal VO2 values to compare the reference MET value vs...
November 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28927538/advances-in-ligase-chain-reaction-and-ligation-based-amplifications-for-genotyping-assays-detection-and-applications
#16
REVIEW
Abdullah A Gibriel, Ola Adel
Genetic variants have been reported to cause several genetic diseases. Various genotyping assays have been developed for diagnostic and screening purposes but with certain limitations in sensitivity, specificity, cost effectiveness and/or time savings. Since the discovery of ligase chain reaction (LCR) in the late nineties, it became one of the most favored platforms for detecting these variants and also for genotyping low abundant contaminants. Recent and powerful modifications with the integration of various detection strategies such as electrochemical and magnetic biosensors, nanoparticles (NPs), quantum dots, quartz crystal and leaky surface acoustic surface biosensors, DNAzyme, rolling circle amplification (RCA), strand displacement amplification (SDA), surface enhanced raman scattering (SERS), chemiluminescence and fluorescence resonance energy transfer have been introduced to both LCR and ligation based amplifications to enable high-throughput and inexpensive multiplex genotyping with improved robustness, simplicity, sensitivity and specificity...
July 2017: Mutation Research
https://www.readbyqxmd.com/read/28922682/the-energy-cost-of-running-with-the-ball-in-soccer
#17
Alessandro Piras, Milena Raffi, Charalampos Atmatzidis, Franco Merni, Rocco Di Michele
Running with the ball is a soccer-specific activity frequently used by players during match play and training drills. Nevertheless, the energy cost (EC) of on-grass running with the ball has not yet been determined. The purpose of this study was therefore to assess the EC of constant-speed running with the ball, and to compare it with the EC of normal running. Eight amateur soccer players performed two 6- min runs at 10 km/h on artificial turf, respectively with and without the ball. EC was measured with indirect calorimetry and, furthermore, estimated with a method based on players' accelerations measured with a GPS receiver...
November 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28895063/considerations-in-the-use-of-body-mass-change-to-estimate-change-in-hydration-status-during-a-161-kilometer-ultramarathon-running-competition
#18
Martin D Hoffman, Eric D B Goulet, Ronald J Maughan
Hydration guidelines found in the scientific and popular literature typically advise that body mass losses beyond 2% should be avoided during exercise. In this work, we demonstrate that these guidelines are not applicable to prolonged exercise of several hours where body mass loss does not reflect an equivalent loss of body water due to the effects of body mass change from substrate use, release of water bound with muscle and liver glycogen, and production of water during substrate metabolism. These effects on the body mass loss required to maintain body water balance are shown for a 161-km mountain ultramarathon running competition participant utilizing published data for the total energy cost, exogenous energy consumption and percentage from each fuel source, average participant body mass, and the extent of soft tissue fluid accumulation during an ultramarathon...
September 11, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28886502/nature-based-solutions-in-the-eu-innovating-with-nature-to-address-social-economic-and-environmental-challenges
#19
Nicolas Faivre, Marco Fritz, Tiago Freitas, Birgit de Boissezon, Sofie Vandewoestijne
Contemporary societies are facing a broad range of challenges, from pressures on human health and well-being to natural capital depletion, and the security of food, water and energy. These challenges are deeply intertwined with global processes, such as climate change and with local events such as natural disasters. The EU's research & innovation (R&I) policy is now seeking to address these challenges from a new perspective, with Nature-Based Solutions, and turn them into innovation opportunities that optimise the synergies between nature, society and the economy...
November 2017: Environmental Research
https://www.readbyqxmd.com/read/28873069/fred-a-gpu-accelerated-fast-monte-carlo-code-for-rapid-treatment-plan-recalculation-in-ion-beam-therapy
#20
A Schiavi, M Senzacqua, S Pioli, A Mairani, G Magro, S Molinelli, M Ciocca, G Battistoni, V Patera
Ion beam therapy is a rapidly growing technique for tumor radiation therapy. Ions allow for a high dose deposition in the tumor region, while sparing the surrounding healthy tissue. For this reason, the highest possible accuracy in the calculation of dose and its spatial distribution is required in treatment planning. On one hand, commonly used treatment planning software solutions adopt a simplified beam-body interaction model by remapping pre-calculated dose distributions into a 3D water-equivalent representation of the patient morphology...
September 5, 2017: Physics in Medicine and Biology
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