JUAN JOSE RAMOS ALVAREZ - Academia.edu (original) (raw)

Papers by JUAN JOSE RAMOS ALVAREZ

Education sciences, Jan 31, 2024

Journal of Functional Morphology and Kinesiology, Jan 2, 2024

La rotura del LCA representa el 50% de las lesiones ligamentosas de rodilla. Produciéndose el 75%... more La rotura del LCA representa el 50% de las lesiones ligamentosas de rodilla. Produciéndose el 75% durante las actividades deportivas. La decisión sobre el tratamiento quirúrgico o conservador depende de diferentes variables. El éxito en el tratamiento y la vuelta a la actividad deportiva en las mejores condiciones posibles puede depender en gran medida del proceso de rehabilitación.

Revista Internacional de Medicina y Ciencias de la Actividad Fisica y del Deporte, 2016

Analisis de parámetros fisiológicos en jugadores juveniles españoles de badminton / Analysis of t... more Analisis de parámetros fisiológicos en jugadores juveniles españoles de badminton / Analysis of the physiological parameters of young spanish badminton players. Revista

Background Concussion is frequent in contact sports, with rugby being one of the sports with the ... more Background Concussion is frequent in contact sports, with rugby being one of the sports with the highest rates of concussion. The aim of this study was to evaluate the baseline Sport Concussion Assessment Tool-5 (SCAT5) values in community Hispanic rugby players of both sexes. Methods The SCAT5 was administered as part of the pre-season medical testing to 219 Hispanic rugby players (female = 81; male = 138). Results Most of the community Spanish rugby players presented some symptom in the SCAT5 (male = 75.4%; female = 91.4%). The number and severity of the symptoms reported by the male players were lower than those reported by the female players (p = 0.001). The time to complete the tandem gait test and balance showed differences between sexes (p < 0.001). Conclusions The baseline SCAT5 values of community Spanish rugby players are different from the baseline SCAT5 values of professional players, which leads to the recommendation of conducting the SCAT5 in all players before the ...

Journal of Physical Education and Sports Management, 2020

Unintentionally, Fick's contribution to exercise physiology has been fundamental both to the unde... more Unintentionally, Fick's contribution to exercise physiology has been fundamental both to the understanding of important concepts and to the practical application. Adolf Eugene Fick proposed a method for the determination of the average cardiac output, based on the principle of conservation of the mass of an indicator. However, the way Fick's equation is expressed by the physiological of the exercise is misused because they establish as a dependent variable the oxygen consumption. Never would Fick have thought that his principle for determining cardiac output would be so fundamental for understanding and applying the body's response to exercise. Therefore, it really should be said: "by solving oxygen consumption in Fick´s equation you get a good conceptual approach to the physiological factors that determine this very important parameter in exercise physiology. This article aims to highlight Fick's true contribution to knowledge of exercise physiology. Indeed, by clearing out Fick's equation, simple mathematical models of cardiac output and the arterio-venous oxygen difference during exercise can be obtained. Finally, from Fick's equation it is possible to understand which are the physiological factors limiting the maximum oxygen consumption, one of the central parameters of exercise physiology.

Exercise is the greatest stress for the cardiovascular system, not only for the human being but f... more Exercise is the greatest stress for the cardiovascular system, not only for the human being but for the rest of vertebrates. For this reason, the cardiovascular response cannot be considered as only one “anthropocentric” meaning. The adjustment of cardiac output to exercise in the five large groups of vertebrates is highly variable. The response of the heart rate and the stroke volume as the main two basic factors that determine the increase in cardiac output is also highly variable. The difference in the range of heart rate is difficult to determine in many vertebrates, both at rest and maximum effort. The increase in stroke volume also differs among vertebrates. For example, while rainbow trout and leopard increase their stroke volume by increasing final diastolic volume (Frank Starling's law), humans do so at the expense of both increasing final diastolic volume and reducing final stroke volume (contractility). The variation in arterial pressure that occurs during exercise al...

Applied Sciences

The COVID-19 is a multiorgan disease that appeared in December 2019 in the Chinese province of Wu... more The COVID-19 is a multiorgan disease that appeared in December 2019 in the Chinese province of Wuhan. It produces various clinical manifestations, although it mainly affects the respiratory system. Given these potentially detrimental long-term consequences of COVID-19, an appropriate assessment must be carried out to plan early rehabilitation interventions. To assess the persistent symptoms it produces, as well as exercise tolerance for a given exertion, stress testing is a feasible and cost-effective option. Therefore, the objective of this study was to provide test-retest reliability for the Chester Step Test and 1 minute Sit to Stand tests and to establish the minimum detectable change in Long-COVID patients. Method: This observational, descriptive, cross-sectional study was conducted following the STROBE guidelines. A total of 42 patients carried out, twice per partici-pant, the Chester Step and 1-Minute Sit-to-Stand (1min-STST) tests on two different days, with a five-day time ...

International Journal of Sports Medicine

This study examines the injuries suffered by players (n=166) of the Spanish national men’s under-... more This study examines the injuries suffered by players (n=166) of the Spanish national men’s under-18 and under-20 rugby teams between 2015 and 2017, and identifies the actions involved in their occurrence. All injuries (total n=78) sustained during matches and training were recorded as recommended by World Rugby, and injury incidence rates per 1000 player-hours (ph) calculated for both types of activity. Injuries occurred more commonly during matches than during training (incidence 105.3 [95% CI: 78.7–131.9] per 1000 [ph] of match play, vs 1.16 [95% CI: 0.69–1.62] per 1000 ph of training), and most days absent per 1000 ph during matches with<3 days rest since the previous match (4209.2 [95% CI: 3516.2–4902.1] per 1000 ph of match play, vs 1947.4 [95% CI: 1511.8–2382.9] per 1000 ph of match play in matches with>3 days rest). These results provide information that may be useful in the development of strategies aimed at reducing the incidence of injuries.

Madrid : Dirección General de Juventud y Deporte, 2017, 2017

Biblioteca de la Universidad Complutense de Madrid, Base de datos de artículos de revistas, ...

Foods

Purpose: Beetroot juice (BRJ) is considered an ergogenic aid with good to strong evidence for imp... more Purpose: Beetroot juice (BRJ) is considered an ergogenic aid with good to strong evidence for improving human performance in sport modalities with similar demands to rugby. However, most of the studies were realized in male athletes with limited evidence in female athletes. Thus, the aim of this study was to explore the acute ingestion of BRJ in female rugby players. Methods: Fourteen semi-professional female rugby players (25.0 ± 3.7 years) belonging to a team from the First Spanish Female Rugby Division participated in this study. Participants were randomly divided into two groups that realized a neuromuscular battery after BRJ (140mL, 12.8 mmol NO3−) or placebo (PLAC, 140 mL, 0.08 mmol NO3−) ingestion on two different days separated by one week between protocols. The neuromuscular test battery consisted of a countermovement jump (CMJ), isometric handgrip strength (i.e., dominant), 10-m and 30-m sprint, agility t-test and Bronco test. Afterwards, participants reported a rate of pe...

The aim, of this work was to quantify the number and duration of the very high-speed running and ... more The aim, of this work was to quantify the number and duration of the very high-speed running and sprinting events (VHSRS) and the recovery interval between them in 36 first and second division professional soccer players. The players were monitored through GPS devices during two official matches. The average duration of the EMAVS was 2.58 ± 0.44 seconds with an average interval between them of 107.07 ± 67.00 s. The mean heart rate (HR) during the EMAVS was 164.92 ± 12.39 p.p.m., reaching 85% of the maximum HR. No significant differences were found between the duration of the VHSRS, the intervals between them and the HR reached (p≤0.05 in all cases), with great individual variability. The use of the duration of the EMAVS, the recovery times and the HR reached during them, would be very useful to design the interval training in football.El objetivo de este trabajo fue cuantificar el número y duración de los esfuerzos de muy alta intensidad y esprint (EMAVS) y el intervalo de recuperac...

Archivos de Medicina del Deporte, 2021

Endurance exercise is a model of physiological integration. There is no other animal activity in ... more Endurance exercise is a model of physiological integration. There is no other animal activity in which cardiovascular, respiratory, metabolic-endocrine and neuromuscular functions are activated at the same time. Even apparently, silent functions are essential during exercise (digestive, renal). During long-term exercise, the absorption of water and carbohydrates is a determining factor in performance. Kidney function plays a fundamental role in trying to preserve the hydro-electrolyte balance during exercise. In this work we present an integrative physiological perspective during dynamic exercise (mobilization of a large muscle mass with a low to moderate degree of strength development), both from the point of view of health and performance. The response of the heart rate in the first moments of exercise is a good example of the feedforward mechanism. Overall, the nervous system has two control mechanisms: feedforward and feedback. These depend on the central command, a more functio...

Introducción: La evaluación antropométrica de los deportistas es necesaria para optimizar la iden... more Introducción: La evaluación antropométrica de los deportistas es necesaria para optimizar la identificación y el desarrollo de los jugadores. Nuestro objetivo es describir las características antropométricas por posición en los jugadores de las selecciones de rugby XV Sub18 y Sub20 durante dos temporadas. Material y método: A 152 jugadores de las selecciones de rugby XV Sub18 y Sub20 de España se les midió la estatura, masa corporal, pliegues cutáneos, porcentaje de tejido graso, masa muscular esquelética (MME), masa mineral ósea (MMO) y somatotipo durante las temporadas 2015-2016 y 2016-2017. Se calculó el promedio y la desviación estándar para cada selección, grupo y posición. Se realizó el análisis de U de Mann-Whitney para comparar entre selecciones y por grupos. Para comparar entre posiciones se utilizó la prueba de Kruskal-Wallis. Resultados: Los jugadores agrupados como delanteros presentan mayor masa corporal, estatura, porcentaje de tejido graso, MME y MMO que los tres cuar...

Foods, 2020

Purpose: the aim of the present study was to analyse the pattern of dietary supplements (DS) cons... more Purpose: the aim of the present study was to analyse the pattern of dietary supplements (DS) consumption on federated rugby players, including the analysis of differences based on the sex and competitive level (professional vs. amateurs). Material and methods: 144 rugby players (83 male and 61 female), of whom 69 were professionals and 75 amateurs, were recruited for the study. All the participants filled out a specific questionnaire about DS consumption including questions related to the consumption of DS and their effects on sport performance and health status. Results: 65.3% of participants declared consuming at least one DS, with a higher prevalence in males than females (77.1% vs. 49.2%) and in professionals thanin amateur players (79.7% vs. 52.0%). The main reason for consumption was to enhance sport performance (62.3%) with differences only based on sex (74.3% males vs. 43.2% females). The most common purchase sites were the Internet (45.6%) and specialised stores (39.8%). As...

Nutrients, 2020

Dietary nitrate (NO3−) supplementation, which can enhance performance in exercise settings involv... more Dietary nitrate (NO3−) supplementation, which can enhance performance in exercise settings involving repeated high-intensity efforts, has been linked to improved skeletal muscle contractile function. Although muscular strength is an important component of explosive movements and sport-specific skills, few studies have quantified indices of muscular strength following NO3− supplementation, particularly isokinetic assessments at different angular velocities. We performed a systematic review and meta-analysis to determine whether dietary NO3− supplementation improves peak torque, as assessed by the gold standard method of isokinetic dynamometry, and if this effect was linked to the angular velocity imposed during the assessment. Dialnet, Directory of Open Access Journals, MEDLINE, PubMed, SciELO, Scopus, and SPORTDiscus were searched for articles using the following search strategy: (nitrate OR beet*) AND (supplement* OR nutr* OR diet*) AND (isokinetic OR strength OR “resistance exerci...