Examinando por Autor "Ramírez-Campillo, R."
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Ítem Anthropometric Characteristics of Top-Class Brazilian Jiu Jitsu Athletes: Role of Fighting Style(Sociedad Chilena de Anatomía, 2014-09) Báez, E.; Franchini, E.; Ramírez-Campillo, R.; Cañas-Jamett, R.; Herrera, T.; Burgos-Jara, C.; Henríquez-Olguín, C.SUMMARY: Human performance efficiency and effectiveness in different sports depend to a large extent on the size, weight and proportion of the physique of the athlete. The aim of this study was to identify morphological characteristics of Brazilian Jiu-Jitsu (BJJ) athletes. The sample consisted of 25 highly trained male athletes who were classified according to their fighting style; guard fighter (GF) vs. pass fighter (PF). The athletes were assessed for somatotype, body composition and proportionality. For the whole group of athletes the somatotype was 2.23±0.68, 6.33±1.14, and 1.75±0.87 for endomorph, mesomorph and ectomorph components, respectively. Muscle and adipose tissue percentages were 52.34±2.15% and 19.30±2.51%, respectively. PF were significantly more mesomorph (p< 0.05) and less ectomorph (p< 0.05) than GF. Also, PF had significantly higher phantom Z score for bone mass vs. GF (0.51±0.57 vs. 0.01±0.54; p<0.05), and significantly lower muscle mass- bone mass ratio (4.55±0.31 vs. 4.77±0.56; p<0.05), height (1.71±0.06 vs. 1.77±0.07; p<0.05) and height weight ratio (40.58±1.11 vs. 41.84±1.22). Our results show that morphological characteristics are related to different fighting styles in BJJ athletes.Ítem Anthropometric Parameters, Physical Activity, Physical Fitness, and Executive Functions among Primary School Children(MDPI, 2022-03) Contreras-Osorio, F.; Guzmán-Guzmán, I.; Cerda-Vega, E.; Chirosa-Ríos, L.; Ramírez-Campillo, R.; Campos-Jara, C.Physical activity during childhood and adolescence favors brain development and cognitive functioning, particularly the executive functions. This study aimed to assess potential associations between anthropometric parameters, physical activity, physical fitness, and executive functions among elementary school children returning to school after the COVID-19 lockdown in Chile. School-age male and female participants (n = 90; age, 10–12 years) participated in the study. To determine the association between variables, a multivariable linear regression analysis was performed. Higher fat-related anthropometric indexes were associated with lower working memory, cognitive flexibility, planning, and attention (r = −0.55 to −0.22; p = 0.031 to <0.001). In contrast, higher physical activity levels, better sprint performance, higher lower-body muscular power, and greater upper-body muscular strength were associated with better working memory, cognitive flexibility, inhibition, planning, and/or attention (r = 0.19 to −0.54; p = 0.04 to <0.001). Current results consistently suggest the need for adequate levels of physical activity, physical fitness, and anthropometric parameters among the school-age population to promote healthy and adequate executive functions.Ítem Efecto de 8 semanas de corriente TENS modificada y la corriente rusa, sobre la fuerza muscular y la composición corporal(Elsevier Doyma, 2016-03) Campos-Jara, C.; Martínez-Salazar, C.; Carrasco-Alarcón, V.; Arcay-Montoya, R.; Ramírez-Campillo, R.; Mariscal-Arcas, M.; Jerez-Mayorga, D.; Da Silva-Grigoletto, M.E.Objetivo: Comparar el efecto de 2 métodos de electroestimulación en las siguientes variables: fuerza y antropometría. Método: Se realizó una investigación experimental, aleatoria y simple ciego. Se evaluó a 18 sujetos, distribuidos en: Grupo Corriente TENS Modificada (CTM: n = 6), Grupo Corriente Rusa (CR: n = 6) y Grupo Control (TC: n = 6, sometido a corriente TENS Convencional, considerada en la presente investigación como placebo). Resultados: Al cabo de 8 semanas, solo CTM incrementó la fuerza máxima (p < 0.035) y redujo el grosor del pliegue subcutáneo de la pierna derecha (p < 0.03). Conclusiones: La técnica de electroestimulación con corriente TENS Modificada es efectiva para el entre namiento muscular. © 2015 Consejería de Turismo y Deporte de la Junta de Andalucía. Publicado por Elsevier España, S.L.U. Este es un artículo Open Access bajo la licencia CC BY-NC-ND (http://creativecommons.org/licenses/by-nc-nd/4.0/).Ítem Effects of Plyometric Training and Beta‐Alanine Supplementation on Maximal‐Intensity Exercise and Endurance in Female Soccer Players(Polish Academy of Science, Committee of Physical Culture, 2017) Rosas, F.; Ramírez-Campillo, R.; Martínez, C.; Caniuqueo, A.; Cañas-Jamet, R.; McCrudden, E.; Meylan, C.; Moran, J.; Nakamura, F.Y.; Pereira, L.A.; Loturco, I.; Diaz, D.; Izquierdo, M.Plyometric training and beta-alanine supplementation are common among soccer players, although its combined use had never been tested. Therefore, a randomized, double-blind, placebo-controlled trial was conducted to compare the effects of a plyometric training program, with or without beta-alanine supplementation, on maximal-intensity and endurance performance in female soccer players during an in-season training period. Athletes (23.7 ± 2.4 years) were assigned to either a plyometric training group receiving a placebo (PLACEBO, n = 8), a plyometric training group receiving beta-alanine supplementation (BA, n = 8), or a control group receiving placebo without following a plyometric training program (CONTROL, n = 9). Athletes were evaluated for single and repeated jumps and sprints, endurance, and change-of-direction speed performance before and after the intervention. Both plyometric training groups improved in explosive jumping (ES = 0.27 to 1.0), sprinting (ES = 0.31 to 0.78), repeated sprinting (ES = 0.39 to 0.91), 60 s repeated jumping (ES = 0.32 to 0.45), endurance (ES = 0.35 to 0.37), and change-of-direction speed performance (ES = 0.36 to 0.58), whereas no significant changes were observed for the CONTROL group. Nevertheless, compared to the CONTROL group, only the BA group showed greater improvements in endurance, repeated sprinting and repeated jumping performances. It was concluded that beta-alanine supplementation during plyometric training may add further adaptive changes related to endurance, repeated sprinting and jumping ability.Ítem Effects of the menstrual phase on the performance and well-being of female youth soccer players(Universidad Catolica San Antonio Murcia, 2022-02) Sánchez, M.; Rodríguez-Fernández, A.; Villa-Del Bosque, M.; Bermejo-Martín, L.; Sánchez-Sánchez, J.; Ramírez-Campillo, R.; Villa-Vicente, J.The aim of the study was to analyze variations in performance and subjective perception of well-being in youth soccer players between menstrual (FM), follicular (FF) and luteal (FL) phases. Twelve female soccer players participated (age, 16.18 ± 1.68 years; height, 164 ± 7.27 cm; body mass, 61.90 ± 6.37 kg), all with 4 years of competitive experience, and 3.1 ± 1 years with a regular menstrual cycle. The maximum speed in 40-m, ability to change direction (25-m with 5 changes of direction of 45º every 5 m), explosive strength of the lower limbs with dominant, non-dominant, bipodal leg and vertical jump height were evaluated using Squat Jump into each phase, along with the Hooper's subjective well-being questionnaire. No differences between menstrual phases were obtained in any performance outcome, sleep, fatigue, stress, or muscle pain (all p> 0.05). However, a lower (worse) general wellbeing (p <0.01) was noted during FM and FL compared to FF. Youth female soccer players well-being perception between menstrual phases provides relevant information to take into account by practitioners working with such athletes.Ítem Effects of the Type of Sports Practice on the Executive Functions of Schoolchildren(MDPI, 2022-03) Contreras-Osorio, F.; Guzmán-Guzmán, I.; Cerda-Vega, E.; Chirosa-Ríos, L.; Ramírez-Campillo, R.; Campos-Jara, C.There is a close relationship between the development of complex motor skills and executive functions during childhood. This study aimed to analyze the differences in different dimensions of executive functions in children practicing an open-skill sport (handball) and a closed-skill sport (athletics) and controls who did not participate in sports activities after a 12-week intervention period. School-aged male and female subjects (n = 90; mean ± standard deviation = 11.45 ± 0.68 years) participated in a non-randomized controlled study. Data analysis was performed using the STATA V.15 statistical software. The athletics intervention promoted semantic fluency (p = 0.007), whereas handball increased inhibition (p = 0.034). Additionally, physical activity improved in both intervention groups (p = < 0.001), whereas sprint performance improved in the handball group following intervention (p = 0.008), lower body muscular power improved in athletics (p = 0.04), and evidence of improvement in upper body muscular strength was noted in handball (p = 0.037). In turn, an increase in the Physical Activity Questionnaire for older Children score showed an association with the Standard Ten scores of executive functions. In conclusion, compared to controls, both athletics and handball induced meaningful improvements in physical activity and executive functions. However, sport-specific adaptations were noted after athletics (i.e., semantic fluency and lower body muscular power) and handball (i.e., inhibition, sprint, and upper-body muscular strength).Ítem High-intensity functional training and quantification by Perceived Exertion Scale in physically active subjects(Universidad Catolica San Antonio Murcia, 2022-02) Bustos-Viviescas, B.; Ramírez-Campillo, R.; Aguirre-Rueda, D.; Osorio, R.; Yerena, E.; Mindiola, A.The purpose of the study was to determine the relationship between internal and external load in physically active subjects (11 men and 5 women) during a high-intensity functional training session, using different load markers: heart rate, perceived effort and the Edwards index. The maximum heart rate was assessed during a maximal incremental endurance test (Course Navette). Thereafter each participant performed a high-intensity functional training session (Workout of the Day-Pukie), while wearing a heart rate monitor, and the perceived effort was assessed with the 0-10 point scale at 0-min, 10-min, 20-min, and 30-min. Thereafter the Edwards index was calculated. The perceived effort was positively correlated with the heart rate and the Edwards index during the different time-points analyzed (Spearman r = 0,76-0,88; p<0,01). In conclusion, perceived effort can be used as a low-cost and logistically convenient method to assess the internal load experienced by physically active participants during a high-intensity functional training session.Ítem Perfil Somatotípico del Futbolista Profesional Chileno(2014 Sociedad Chilena de Anatomía, 2013) Henríquez-Olguín, C.; Báez, E.; Ramírez-Campillo, R.; Cañas, R.RESUMEN: El presente estudio pretende describir el somatotipo del futbolista profesional chileno, así como determinar la variabilidad existente en el somatotipo por posición de juego. Cien jugadores profesionales varones (edad 23±4,4 años), participantes del campeonato nacional de fútbol chileno fueron incluidos en el estudio. Se realizó la medición de 10 variables antropométricas según las normas de la International Society for the Advancement of Kinanthropometry (ISAK). Se calcularon los 3 componentes del somatotipo de Heath-Carter por cada posición de juego. El somatotipo grupal de la muestra estudiada presentó una clasificación de mesomorfobalanceado (2,25-5,32-2,26), siendo los defensas los con mayor predominio de este componente. La posición con menor dispersión en su somatotipo son defensas y arqueros, mientras que volantes y delanteros presentan mayor variabilidad. En conclusión, a pesar de existir un somatotipo en común, las diferencias en las varianzas entre posiciones de juego entregan información sobre la relevancia de la optimización morfológica en una posición específica de juego. PALABRAS CLAVE: Somatotipo; Antropometría; Fútbol masculino.