Hristovski, Robert

Preferred name

Hristovski, Robert

Official Name

Hristovski, Robert

Main Affiliation

robert_hristovski@yahoo.com

Now showing 1 - 9 of 9

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Principal component analysis as a novel approach for cardiorespiratory exercise testing evaluation
(IOP Publishing, 2019)
Garcia-Retortillo, Sergi
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Javierre, Casimiro
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Ventura, Josep Lluís
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Balagué, Natàlia
Our purpose was to apply a principal component analysis (PCA) approach to cardiorespiratory exercise to test evaluation and its sensitivity to workload accumulation.
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Effects of Temporary Numerical Imbalances on Collective Exploratory Behavior of Young and Professional Football Players
(Frontiers Media SA, 2019)
Canton, Albert
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Torrents, Carlota
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Ric, Angel
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Gonçalves, Bruno
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Sampaio, Jaime
The aim of this study was to explore how the use of temporary numerical imbalances during small-sided Game SSGs affects team's exploratory behaviors (i.e., variety and quantity of responses given in an ever-changing game context and its rate of change) in different age groups. Two different age groups (under-15 and under-23) of football players participated in the study. For each age group, three teams of five players played six small-sided games of 5 min duration in different conditions: (i) numerical balance (GK + 4 vs. 4 + GK); (ii) temporary numerical imbalance, which consisted of a numerical change of teammates and opponents every one minute. Latitude and longitude GPS coordinates were used to determine the positioning-derived variables. The dynamic overlap (i.e. the measure of average similarity of the game patterns that take place in increasingly larger time intervals) was used to provide information of the rate and breadth of exploratory behavior. The results revealed that the long-term exploratory breadth increased for the under-23 age group. Non-clear effects were found for the short-term rate of exploration, but with an increasing trend. In the under-15 group, the exploratory behavior was more likely to increase in the long term. The increase for the short-term rate of exploration was unclear, but it follows an increasing trend. These results suggest that the use of temporary numerical imbalances could offer coaches more dynamic training situations and different adaptive training environments similar to matches.
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Physiological- and performance-related effects of acute olive oil supplementation at moderate exercise intensity
(Springer Science and Business Media LLC, 2019-03-01)
Esquius, Laura
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Garcia-Retortillo, Sergi
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Balagué, Natàlia
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Javierre, Casimiro
The consumption of olive oil is associated with a diminished risk of cardiovascular disorders and mortality, but the impact of olive oil supplementation on endurance performance is still unclear. Since the beneficial effects of olive oil are observed at a systemic level, its effectiveness may not be precisely measured through the commonly registered maximal and threshold values of some physiological and performance parameters. In contrast, we suggest evaluating it through variables able to capture the coordinated behaviour of physiological systems. Thus, the aim of the current research was to assess the effect of an acute extra virgin olive oil supplementation on cardiorespiratory coordination (CRC) and performance, compared to palm oil.
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Transdisciplinary embodied education in elementary school: a real integrative approach for the science, technology, engineering, arts, and mathematics teaching
(Frontiers Media SA, 2023-05-18)
Almarcha, Maricarmen
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Vázquez, Pablo
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Balagué, Natàlia
<jats:sec><jats:title>Introduction</jats:title><jats:p>Connecting academic disciplines and integrating knowledge is gaining popularity in elementary school. The relevant question is, how the targeted integration could be achieved? This research aimed to (a) evaluate the potential of teaching and learning Dynamic Systems Theory (DST) and Statistical Physics (ST) general concepts through embodied experiences in elementary school and, based on it (b) enable a far transfer analogical reasoning within and between different academic subjects.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Forty-eight elementary school students, aged 10.2 ± 0.82 y.o., followed an 8-week, 2-h/week intervention. The learning protocol contained a concreteness fading sequence of phases and consisted of four steps: (a) embodied experience, (b) reflective observation, (c) abstract conceptualization of DST/ST concepts, and (d) transfer of the DST/SP concepts to physical, sociological, biological and ecological phenomena. A validated questionnaire and an interview evaluated students’ knowledge and analogical reasoning.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>The Wilcoxon Signed Ranks Test showed a general positive effect of the intervention on the understanding of DSP/SP concepts and on the far transfer competencies of students (<jats:italic>Z</jats:italic> = −5.98; <jats:italic>p</jats:italic> < 0.0001). There was no association between the previous and newly acquired competencies (Spearman’s ρ = 0.112; <jats:italic>p</jats:italic> = 0.441).</jats:p></jats:sec><jats:sec><jats:title>Discusion</jats:title><jats:p>The qualitative results showed that, in general, the suggested embodied learning protocol supports the acquisition of DST/SP general concepts and the far transfer competencies. However, students of this age are possibly highly sensitive to the balance of the focus between the embodied phases and the conceptualization/transfer phases of the learning protocol. The study points to the potential of learning the general DST/SP for elementary school students’ integrative and far transfer competencies. The DST/SP concept-based transdisciplinary embodied education may offer a truly integrative approach to STEAM teaching.</jats:p></jats:sec>
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ACTN3 association on maximal muscle power, after 6 weeks of power training
(Faculty of physical education sport and health, 2021-06)
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The research tried to discover/find out [1] whether the success of transformation of max muscle power will be just because of the training sessions? Or perhaps [2] the genetic potential of examinees will be important to make bigger and faster transformation of max muscular power. The experimental program was applied within (N) 21 examinees, age of 18-20 years, non-athlete population, for a period of 6 weeks. The programme included exercises for transformation of the maximal strength component of the flexors and extensors muscles on the elbow of the examinees' non-dominant arm (load- 90-95% of one repetition maximum). Three tests for one repetition maximum (flexion+ extension) were performed (program start, 3th and 6th week). Mutation of ACTN3 genotype allele, of the examinees, were analysed, according to establish three types of examinees: (type I) slow-oxidative - XX type/group, (type IIA) fast oxidative/glycolytic RX type/group and (type IIB) fast glycolytic -RR type/group. The three groups of examinees (XX, RR, XR) do not differ in terms of the achievements of one repetition maximum (flexors/extensors) after 3th and after 6th week. The genetic predisposition of the muscle tissue for strength capacities is not always decisive for the transformation of the maximal strength abilities.
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Network Physiology of Exercise: Beyond Molecular and Omics Perspectives
(Springer Science and Business Media LLC, 2022-09-23)
Balagué, Natàlia
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Almarcha, Maricarmen
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Garcia-Retortillo, Sergi
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Ivanov, Plamen Ch
Molecular Exercise Physiology and Omics approaches represent an important step toward synthesis and integration, the original essence of Physiology. Despite the significant progress they have introduced in Exercise Physiology (EP), some of their theoretical and methodological assumptions are still limiting the understanding of the complexity of sport-related phenomena. Based on general principles of biological evolution and supported by complex network science, this paper aims to contrast theoretical and methodological aspects of molecular and network-based approaches to EP. After explaining the main EP challenges and why sport-related phenomena cannot be understood if reduced to the molecular level, the paper proposes some methodological research advances related to the type of studied variables and measures, the data acquisition techniques, the type of data analysis and the assumed relations among physiological levels. Inspired by Network Physiology, Network Physiology of Exercise provides a new paradigm and formalism to quantify cross-communication among diverse systems across levels and time scales to improve our understanding of exercise-related phenomena and opens new horizons for exercise testing in health and disease.
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Integrative Proposals of Sports Monitoring: Subjective Outperforms Objective Monitoring
(Springer Science and Business Media LLC, 2022-03-26)
Montull, Lluc
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Slapšinskaitė-Dackevičienė, Agne
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Kiely, John
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Balagué, Natàlia
Current trends in sports monitoring are characterized by the massive collection of tech-based biomechanical, physiological and performance data, integrated through mathematical algorithms. However, the application of algorithms, predicated on mechanistic assumptions of how athletes operate, cannot capture, assess and adequately promote athletes' health and performance. The objective of this paper is to reorient the current integrative proposals of sports monitoring by re-conceptualizing athletes as complex adaptive systems (CAS). CAS contain higher-order perceptual units that provide continuous and multilevel integrated information about performer-environment interactions. Such integrative properties offer exceptional possibilities of subjective monitoring for outperforming any objective monitoring system. Future research should investigate how to enhance this human potential to contribute further to athletes' health and performance. This line of argument is not intended to advocate for the elimination of objective assessments, but to highlight the integrative possibilities of subjective monitoring.
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Long-term exercise adaptation. Physical aging phenomena in biological networks
(Frontiers Media SA, 2023-10-04)
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Balagué, Natàlia
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Stevanovski, Marko
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Desarrollo y evaluación de la creatividad motriz en el fútbol: estado de la cuestión (Development and evaluation of motor creativity in football: state of the art)
(Federacion Espanola de Asociaciones de Docentes de Educacion Fisica (FEADEF), 2022-09-28)
Canton, Albert
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Torrents, Carlota
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Ric, Angel
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<jats:p>En el fútbol, la creatividad motriz, tanto a nivel individual como grupal, es necesaria para disponer de un repertorio de respuestas diverso o para ser impredecibles para los oponentes. No obstante, estas respuestas deberían ser lo suficientemente estables para que sean predecibles para los integrantes de un mismo equipo. El objetivo de este estudio fue mostrar el estado de la cuestión en la literatura científica en relación con el desarrollo y la evaluación de la creatividad motriz en el fútbol, poniendo especial énfasis en la investigación centrada en una visión compleja del comportamiento motor. Tradicionalmente se han descrito tres componentes para analizar la creatividad: la fluidez, la flexibilidad y la originalidad. A partir de la comprensión de la creatividad como un fenómeno complejo, se analizan diferentes propuestas metodológicas que han sido investigadas en la literatura científica, como el uso de Juegos Reducidos o el Aprendizaje Diferencial. Existen dificultades para medir la creatividad, no obstante, se han diseñado herramientas para evaluar comportamientos creativos de forma subjetiva a partir de la observación de videos por parte de expertos a través de rúbricas y análisis de video. Desde la aplicación de las ciencias de la complejidad a la investigación deportiva, se ha medido también aplicando métodos matemáticos y/o estadísticos como son diferentes medidas de entropía, el dynamic overlap para medir la flexibilidad y la fluidez del comportamiento motor o el PCA y el Tucker’s Coefficient, que se pueden utilizar para medir la originalidad. En este artículo se pone en valor la importancia de la creatividad en los contextos deportivos, concretamente en la práctica del fútbol. Finalmente, se presentan varias propuestas de futuro para la evaluación y desarrollo de la creatividad en el fútbol. Abstract. In football, motor creativity, both individually and in groups, is necessary to have a diverse repertoire of responses or to be unpredictable for opponents. However, these responses should be stable enough to be predictable for members of the same team. The objective of this study was to show the state of the art in the scientific literature in relation to the development and evaluation of motor creativity in football, placing special emphasis on research focused on a complex view of motor behaviour. Three components have traditionally been described to analyse creativity: fluency, flexibility and originality. Starting from the understanding of creativity as a complex phenomenon, different methodological proposals that have been investigated in the scientific literature are analysed, such as the use of small-sided games or Differential Learning. There are difficulties in measuring creativity, however, tools have been designed to subjectively assess creative behaviours from the observation of videos by experts through rubrics and video analysis. From the application of the sciences of complexity to sports research, it has also been measured by applying mathematical and/or statistical methods such as different entropy measures, the dynamic overlap to measure the flexibility and fluidity of motor behaviour or the PCA and the Tucker's Coefficient, which can be used to measure originality. This article highlights the importance of creativity in sports contexts, specifically in the practice of football. Finally, several future proposals are presented for the evaluation and development of creativity in football.</jats:p>

Hristovski, Robert

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