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Factors that affect heart rate variability following acute resistance exercise:A systematic review and meta-analysis

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Journal of Sport and Health Science 2022年第3期11卷 376-392页

作者： Sajith U.Marasingha-Arachchige jacoboá.rubio-arias Pedro E.Alcaraz Linda H.Chung UCAM Research Center for High Performance Sport Catholic University of MurciaMurcia 30107Spain LFE Research Group Department of Health and Human PerformanceFaculty of Physical Activity and Sport Science-INEFUniversidad Politécnica de MadridMadrid 28040Spain Faculty of Sport Catholic University of MurciaMurcia 30107Spain

Background:There is controversial evidence regarding the effect of acute resistance exercise(ARE) on heart rate variability(HRV) parameters,which indicates the activities of the cardiac autonomic nervous *** aim of this study was to perform a systematic review and meta-analysis of the literature on the effect of ARE on HRV parameters and identify its possible moderating ***:The PubMed-Medline,Web of Science,SPORTDiscus,and Cochrane Library databases were *** Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA) declaration was followed,and the methodological quality of the studies was *** level of significance was set at p≤***-six studies met the inclusion *** effect analyses between pre-and post-test interventions demonstrated an increase in normalized units low frequency(p <0.001;standardized mean difference(SMD)=0.78;95% confidence interval(95%CI):0.46-1.11) and low frequency/high frequency ratio(p <0.001;SMD=0.82;95%CI:0.64-0.99) and a decrease in standard deviation of the normal-to-normal(NN)interval(p <0.001;SMD=-0.58;95%CI:-0.85 to-0.30),root mean square of the successive differences(p <0.001;SMD=-1.01;95%CI:-1.29 to-0.74),and normalized units high frequency(p <0.001;SMD:-1.08;95%CI:-1.43 to-0.73) following ARE in healthy individuals range:15 ± 1 to 48 ± 2 years;mean ± SD).Results:There were differences between the subgroups in the number of sets used in an exercise(p=0.05) for root mean square of the successive differences,as well as for exercise intensity(p=0.01) and rest between sets(p=0.05) for normalized units high ***,there were differences between the subgroups in training volume for root mean square of the successive differences(p=0.01),normalized units high frequency(p=0.003) and normalized units low frequency(p=0.02).Conclusion:Overall,there was a withdrawal of cardiac parasympathetic and activation of cardiac sympathetic modulations following ARE,and th

关键词： Cardiac Parasympathetic Sympathetic

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Effects of medium-and long-distance running on cardiac damage markers in amateur runners:a systematic review,meta-analysis,and metaregression

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Journal of Sport and Health Science 2021年第2期10卷 192-200页

作者： jacobo A.rubio-arias Luis Andreu Luis Manuel Martinez-Aranda Alejandro Martinez-Rodriguez Pedro Manonelles Domingo J.Ramos-Campo Faculty of Sport Catholic University of San Antonio(UCAM)Murcia 30107Spain LFE Research Group Department of Health and Human PerformanceFaculty of Physical Activity and Sport Science-INEFUniversidad Politecnica de MadridMadrid 28040Spain International Chair of Sports Medicine Catholic University of San Antonio(UCAM)Murcia 30107Spain Neuroscience of Human Movement Research Group(Neuromove) Catholic University of San Antonio(UCAM)Murcia 30107Spain Faculty of Sciences University of AlicanteAlicante 03690Spain

Background:To finish an endurance race,athletes perform a vigorous effort that induces the release of cardiac damage *** are several factors that can affect the total number of these markers,so the aim of this review was to analyze the effect of endurance running races on cardiac damage markers and to identify the factors that modify the levels of segregation of these cardiac damage ***:A systematic search of PubMed,Web of Science,and the Cochrane Library databases was *** analysis included studies where the acute effects of running races on cardiac damage markers(troponin I and troponin T)were analyzed,assessing the levels of these markers before and after the ***:The effects of running races on troponin I(mean difference=0.0381 ng/mL)and troponin T(mean difference=0.0256 ng/mL)levels were *** ages(R^(2)=14.4%,p=0.033)and body mass indexes(R^(2)=14.5%,p=0.045)of the athletes had a significant interaction with troponin *** addition,gender,mean speed,time to finish the race,and type of race can affect the level of cardiac damage ***:Endurance running races induce the release of cardiac-damage markers that remain elevated for at least 24 h after the *** addition,young male athletes with high body mass indexes who perform races combining long duration and moderate intensity(i.e.,marathons)release the highest levels of cardiac damage *** should take into consideration these results in the diagnosis and treatment of patients admitted to the hospital days after finishing endurance running races.

关键词： Endurance races Troponin I Troponin T Ultra-endurance

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Heart rate variability to assess ventilatory thresholds in professional basketball players

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Journal of Sport and Health Science 2017年第4期6卷 468-473页

作者： Domingo Jesús Ramos-Campo jacobo A. rubio-arias Vicente Avila-Gandia Cristian Marin-Pagan Antonio Luque Pedro E. Alcaraz Department of Physical Activity and Sport Science Faculty of Sports Catholic University ofMurcia Murcia 30107 Spain Department of Physiology Catholic University ofMurcia Murcia 30}07 Spain UCAM Research Center for High Performance Sport Mureia 30107 Spain

Purpose: The aim of this study was to determine if heart rate variability(HRV) during incremental test could be used to estimate ventilatory threshold(VT) in professional basketball players, with sufficient precision to be used in their training. Furthermore, the second aim was to analyse the association between HRV and 3 methods of VT determination by gas ***: Twenty-four professional basketball players(age: 23.4 ± 4.9 years; height: 195.4 ± 9.8 cm; body mass: 92.2 ± 11.9 kg) performed an incremental running test to exhaustion. First ventilatory threshold(VT1) was determined by ventilatory equivalent(VE) and HRV and second ventilatory threshold(VT2) was determined by 3 methods of gases analysis(V-slope, VE and gas exchange ratio(R), and HRV). Pearson's coefficient(r) was used to detect differences between data and the strength of each relationship. The mean of absolute differences and Bland–Altman analysis were used to evaluate whether there was ***: The results showed no significant differences in HR and oxygen consumption(VO2) at VT1 between the 2 methods. Furthermore, no significant differences among the methods of gases analysis and HRV were observed in speed, HR, and VO2 at VT2. Moreover, VTs estimated using HRV and gas methods were significantly correlated. Correlation in HR values was higher between R and HRV(r = 0.96) and VE and HRV(r = 0.96) than V-slope and HRV(r = 0.90).Conclusion: These findings provide a practical, inexpensive approach for evaluating specific training loads when determining VT2 in basketball players. Therefore, HRV is an alternative method to determine VT2 without the application of expensive technology that limits its use to laboratories.

关键词： Anaerobic threshold Basketball Oxygen uptake Performance Training Ventilatory threshold

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Complexity of adaptive testing in scenarios defined extensionally

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Frontiers of Computer Science 2023年第3期17卷 11-28页

作者： Ismael RODRÍGUEZ David rubio Fernando rubio Dpto.Sistemas Informáticos y Computación Facultad de InformáticaUniversidad Complutense de MadridMadrid 28040Spain Instituto de Tecnologías del Conocimiento Universidad Complutense de MadridMadrid 28040Spain Instituto de Biomecánica de Valencia.Universitat Politècnica de València València 46022Spain

In this paper,we consider a testing setting where the set of possible definitions of the Implementation Under Test(IUT),as well as the behavior of each of these definitions in all possible interactions,are extensionally defined,i.e.,on an element-by-element and case-by-case *** this setting,the problem of finding the minimum testing strategy such that collected observations will necessarily let us decide whether the IUT is correct or not(i.e.,whether it necessarily belongs to the set of possible correct definitions or not)is studied in four possible problem variants:with or without non-determinism;and with or without more than one possible definition in the sets of possible correct and incorrect *** computational complexity of these variants is studied,and properties such as PSPACE-completeness and Log-APX-hardness are identified.

关键词： formal testing adaptive testing computational complexity PSPACE-completeness approximation hardness

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High-Efficiency DC-DC Converter for Large Input-Voltage Fluctuations in Solar Applications

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Chinese Journal of Electronics 2015年第3期24卷 502-507页

作者： AGUILLON-GARCIA jacobo BANUELOS-SANCHEZ Pedro SIST Sun Yat-sen University

In the solar energy systems the solar irradiance variation is partially engaged, limiting the converter’s transformation rate for a certain input amount and leaving the rest of energy unconverted. In order to utilize at its maximum the energy provided from a Photovoltaic(PVP) system, this manuscript proposed a topology that can cope with marginal input voltage variations from 60V(DC) up to 1050V(DC) for a steady output voltage of 700V(DC). This output voltage value is suitable for any interlink post-regulation architecture. Based on previous observations, this paper presents a wide-input voltage high-efficiency non-isolated single-control topology. Analysis, operating stages, simulations and experimental results for a 3k W prototype are presented.

关键词： DC-DC power converters Energy conversion Photovoltaic system Power conditioning Solar generation

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Role of Air Staging in a Batch-Type Fixed Bed Biomass Combustor under Constant Primary Air

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Journal of Thermal Science 2024年第1期33卷 284-299页

作者： Awais JUNEJO Yasir M.AL-ABDELI jacobo PORTEIRO School of Engineering Edith Cowan UniversityJoondalupWA 6027Australia CINTECX Universidade de Vigo Grupo de Tecnoloxia Enerxetica(GTE)36310 VigoEspana

Staged combustion of biomass is the most suitable thermo-chemical conversion for achieving lower gaseous emissions and higher fuel conversion *** a staged fixed bed combustion of biomass,combustion air is supplied in two *** the first stage,primary air is provided below the fuel,whereas in the later stage,secondary air is supplied in the freeboard *** available literature on the effects of air staging(secondary air location) at a constant primary air flow rate on combustion characteristics in a batch-type fixed bed combustor is limited and hence warrants further *** study resolves the effect of air staging,by varying the location of secondary air in the freeboard at five secondary to total air ratios in a batch-type fixed bed *** are reported for the effects of these controlled parameters on fuel conversion rate,overall gaseous emissions(CO_(2),CO and NO_x) and temperature *** fuel used throughout was densified hardwood *** show that a primary freeboard length(distance between fuel bed top and secondary air injection) of200 mm has higher fuel conversion rates and temperatures as well as lower CO emissions,at a secondary to total air ratio of 0.75 as compared to primary freeboard length of 300 ***,NO_x emissions were found to be lower for a primary freeboard length of 300 mm as compared to 200 *** increase in secondary to total air ratio from 0.33 to 0.75 resulted in higher freeboard temperatures and lower CO as well as NO_x *** outcomes of this study will be helpful in the effective design of commercial scale biomass combustors for more efficient and environmentally friendly combustion.

关键词： fixed bed combustor biomass combustion air staging freeboard temperature burning rate gaseous emissions

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Ferrofluid moving thin films for active flow control

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Chinese Journal of Aeronautics 2021年第5期34卷 115-119页

作者： Francisco J.arias Department of Fluid Mechanics Polytechnic University of CataloniaESEIAATC/Colom 1108222 BarcelonaSpain

Ferrofluid moving thin films and their possible significance with regard to active flow control for lift and attack angle enhancement are *** this strategy,a very thin film of ferrofluid is strongly attached at the wall of the wing by a normal magnetic field from below and pumped tangentially along the *** a simplified physical model and from the available experimental data on moving walls,the expected lift enhancement and effect on the attack angle were *** research and design is required in order to explore the possibilities in the use of ferrofluid moving thin films.

关键词： Active flow control Boundary layer separation Ferrofluid

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Caving performance through the integration of microseismic activity and numerical modeling at DOZ-PT Freeport,Indonesia

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International Journal of Minerals,Metallurgy and Materials 2009年第1期16卷 1-6页

作者： rubio Enrique Napitupulu Daulat Mining Engineering Department Universidad de Chile Geotechnical Engineering Department PT Freeport IndonesiaTembagapuraIndonesia

This article describes an undergoing research at PT Freeport, Indonesia, in which the main goal is to use the microseismic information recorded as a result of mining to analyze cave propagation and stress performance on the actual production and fixed infrastructure. At the moment, several numerical experiments have been conducted to correlate the mining activity with the microseismic events using the data collected during year 2005 and 2006. As a result of the preliminary analysis a micro- and a macrocracking envelop were proposed on the basis of computation of stress behavior at the location of the events. Stresses have been computed using standard elastic continuous boundary element models. The correlation between the average source radius and the stress performance has provided a method to propose a macrocracking criterion. Several techniques have been tested to nucleate the microseismic activity around different geological features. This last attempt was aimed to look at potential overstresses induced over the undercut and extraction level drifts. A method was devised to integrate the microseismicity into a 3-dimensional ride distribution model. This model has shown to be very effective to quantify the overstress induced as a result of computing volumetric microseismicity density. The volumetric microseismic model showed to induce overstress up to 10 MPa over a period of two months. The future work will concentrate on the calibration of the integrated model with actual damage observations made at the current mining infrastructure.

关键词： microseism underground mining block caving stress distribution microcrack criterion

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Do new neurons contribute to functional reorganization after brain damage?

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Neural Regeneration Research 2018年第12期13卷 2083-2084页

作者： Clorinda arias Angelica Zepeda Departamento de Medicina Genómica y Toxicología Ambiental Instituto de Investigaciones Biomédicas Universidad Nacional Autónoma de México

The finding that adult neurogenesis occurs constitutively in the brain was a breakthrough in neuroscience and soon gained attention as a possible mechanism for neurorepair after brain damage. In a recent study we show that the dentate gyrus （DG） reorganizes anatomically over neurons undergo maturation time after damage, while new and activate in response to a contextual fear memory recall （Aguilar-Arredondo and Zepeda, 2018）. These findings provide new evidence on the possible role of neurogenesis in cognitive recovery after brain injury.

关键词： Do new neurons contribute to functional reorganization after brain damage

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An ACO-RFD hybrid method to solve NP-complete problems

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Frontiers of Computer Science 2013年第5期7卷 729-744页

作者： Pablo RABANAL Ismael RODRIGUEZ Fernando rubio Dept. Sistemas Inforrnaiticos y Computacion Facultad de Informatica Universidad Complutense de Madrid Madrid 28040 Spain

In this paper we hybridize ant colony optimiza- tion （ACt） and river formation dynamics （RFD）, two related swarm intelligence methods. In ACt, ants form paths （prob- lem solutions） by following each other＇s pheromone trails and reinforcing trails at best paths until eventually a single path is followed. On the other hand, RFD is based on copy- ing how drops form rivers by eroding the ground and de- positing sediments. In a rough sense, RFD can be seen as a gradient-oriented version of ACt. Several previous experi- ments have shown that the gradient orientation of RFD makes this method solve problems in a different way as ACt. In particular, RFD typically performs deeper searches, which in turn makes it find worse solutions than ACt in the first exe- cution steps in general, though RFD solutions surpass ACt solutions after some more time passes. In this paper we try to get the best features of both worlds by hybridizing RFD and ACt. We use a kind of ant-drop hybrid and consider both pheromone trails and altitudes in the environment. We apply the hybrid method, as well as ACt and RFD, to solve two NP-hard problems where ACt and RFD fit in a different manner： the traveling salesman problem （TSP） and the prob- lem of the minimum distances tree in a variable-cost graph （MDV）. We compare the results of each method and we an- alyze the advantages of using the hybrid approach in each case.

关键词： river formation dynamics ant colony optimization heuristic algorithms NP-hard problems

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