Assessment of the load-velocity profile in the free-weight prone bench pull exercise through different velocity variables and regression models

This aims of this study were (I) to determine the velocity variable and regression model which best fit the load-velocity relationship during the free-weight prone bench pull exercise, (II) to compare the reliability of the velocity attained at each percentage of the one-repetition maximum (1RM) between different velocity variables and regression models, and (III) to compare the within- and between-subject variability of the velocity attained at each %1RM. Eighteen men (14 rowers and four weightlifters) performed an incremental test during the free-weight prone bench pull exercise in two different sessions. General and individual load-velocity relationships were modelled through three velocity variables (mean velocity [MV], mean propulsive velocity [MPV] and peak velocity [PV]) and two regression models (linear and second-order polynomial)

Muscle Quality and Functional and Conventional Ratios of Trunk Strength in Young Healthy Subjects: A Pilot Study

Background: The trunk strength conventional ratio (CR) has been evaluated. However, the functional ratio and the ratio of strength to body weight (BW) or muscle mass (MM) have been poorly explored. Relative strength is a measure of muscle quality. Objectives: To analyze the trunk strength ratio normalized by BW and MM and compare the trunk's conventional and functional ratios collected in isokinetic and isometric conditions. Methods: Twenty-seven healthy males (21.48 +/- 2.08 years, 70.22 +/- 7.65 kg) were evaluated for trunk isometric and isokinetic strength using a functional electromechanical dynamometer. Results: The extensor's strength was greater than the flexors, with a CR of 0.41 +/- 0.10 to 0.44 +/- 0.10. Muscle quality was higher in eccentric contraction and high velocity for flexors and extensors. The functional flexor ratio (FFR) ranged between 0.41 +/- 0.09 and 0.92 +/- 0.27. The functional extensor ratio (FER) ranged between 2.53 +/- 0.65 and 4.92 +/- 1.26. The FFR and FER showed significant differences between velocities when considering the peak strength (p = 0.001) and mean strength (p = 0.001). Conclusions: Trunk extensors were stronger than the flexors; thus, the CR was less than one. Muscle quality was higher at a high velocity. Unlike CR, FFR and FER behaved differently at distinct velocities. This finding highlights the need to explore the behavior of the functional ratio in different populations.DGI-University Andres Bello DI-08-CBC/22FEDER/Ministry of Science, Innovation, and Universities-State Research Agency RTI2018-099723-B-I0

Determination of periodontopathogens in patients with Cri du chat syndrome

Objectives: Cri du chat syndrome is a genetic alteration associated with some oral pathologies. However, it has not been described previously any clinical relationship between the periodontal disease and the syndrome. The purpose of this comparative study was to compare periodontopathogenic flora in a group with Cri du chat syndrome and another without the síndrome, to assess a potential microbiological predisposition to suffer a periodontitis. Study Design: The study compared nineteen subjects with Cri du chat Syndrome with a control group of nineteen patients without it. All patients were clinically evaluated by periodontal probing, valuing the pocket depth, the clinical attachmente level and bleeding on probing. There were no significant differences between both groups. Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Tannerella forsythia and Treponema denticola were detected by multiplex-PCR using 16S rDNA (microIDENT). Results: When A. actinomycetemcomitans, P. gingivalis, P. intermedia and T. denticola were compared, no statistically significant differences were found between the two groups (p>0.05). The value of T. forsythia was significantly higher for Cri du chat syndrome (31.6%) than for the control group (5.3%). The odds ratio for T. forsythia was 8.3. Conclusions: In the present study T. forsythia is associated with Cri du chat syndrome subjects and not with healthy subjects

Reliability of a handball specific strength test battery and the association with sprint and throwing performance in young handball players

[EN] BACKGROUND: A greater motivation for coaches to be more involved in assessment could be the development of specific strength tests closer to specific handball tasks. Therefore, the aims were to determine the reliability of a handball specific strength test battery in young handball players using a functional electromechanical dynamometer (FEMD) and to evaluate the association between the strength test battery and performance measurements. METHODS: Thirty-two young handball players (25% males and 75% females) performed a repeated-measurement design over four weeks. The players conducted one session per week, with each measurement consisting of two isometric tests to obtain isometric peak force, and four incremental tests. Moreover, performance handball tests (sprint and throwing velocity [TV]) were recorded. RESULTS: The reliability of the whole handball specific strength tests was very high for the peak and mean strength (ICC=0.70-0.85; CV=8.49- 13.99; SEM=0.44-0.67 kg). The step forward had a moderate association with 5 to 10 meters’ time. The highest correlation between TVmean was found with the peak strength of standing lift and between TVpeak with peak strength of unilateral throw. The sprint total time could be explained by Body Mass Index and peak strength of the standing lift in the 40% and the TVpeak could be explained by arm span and mean strength of the standing lift in the 68%. CONCLUSIONS: The high reliability for all exercises and the significant correlation with handball performance (sprint time and TV) allow us to include these tests in handball team evaluation and training.S

Factores de riesgo de los trastornos hipertensivos inducidos por el embarazo en mujeres atendidas en una entidad de salud de Santa Marta

The Hypertensive disorders of pregnancy are a public health problem, is the first cause of maternal death in the developed countries and the third in developing countries. Objective: To identify the riskfactors those determine the occurrence of the hypertensive disorders in pregnant women attending in a health institution of Santa Marta, Colombia, in the months of January 2011 to January 2012. Materials and Methods: descriptive study, quantitative retrospective, executed in a group of 51 pregnant patients who had hypertensive disorders. The collection techniques of information used were based on the documentary review (medical history) and the application of an inquest previously validated by experts. Through these methods found variables which allowed identifying the risk factors in the hypertensive disorders of pregnant women. Results: The age distribution was ubicated in the range 26-34 years old / 54.8%), risk factors present were: underweight (45.0%), not attending antenatal care (11.8%), multiparous (56.9%), socioeconomic status medium high (45.1), family history related hypertensive disorder of the mother (39.2%), medical history of urinary tract infections (83.3%) and alcohol consumption (58.8%). Conclusions: The risk factors of medical history of urinary tract infections occurred in a high percentage (83.3%), alcohol consumption, and family history multiparity, occupied an important place, while the significant level of assistance to prenatal care not prevent the appearance of hypertensive disorder.Los trastornos hipertensivos del embarazo, son un problema de salud pública, la primera causa de muerte materna en países desarrollados y la tercera en países en desarrollo. Objetivo: Identificar los factores de riesgos que determinan la aparición de los trastornos hipertensivos, en mujeres embarazadas atendidas en una entidad de salud de Santa Marta, Colombia, en los meses de enero de 2011 a enero 2012. Materiales y métodos: estudio descriptivo, cuantitativo retrospectivo, realizado a un grupo de 51 pacientes gestantes que presentaron trastornos hipertensivos. Las técnicas de recolección de información se basaron en la revisión documental (historias clínicas) y la aplicación de una encuesta previamente validada por expertos. A través de estos métodos se consignaron variables que permitieron identificar los factores en los trastornos hipertensivos de las gestantes. Resultados: la distribución por edad se ubicó en el rango 26 a 34 años (54.8%), los factores de riesgos presentes fueron: bajo peso (45.0%), no asistencia a controles prenatales (11,8%), multiparidad (56.9%), nivel socioeconómico medio-alto (45.1), antecedentes familiares relacionados con alteración hipertensiva de la madre (39.2%), antecedentes personales patológicos de infecciones urinarias (83.3%) y consumo de alcohol (58.8%). Conclusiones: los factores de riesgo de antecedentes personales patológicos de infecciones urinarias se presentaron en un alto porcentaje (83,3%), el consumo de alcohol, multiparidad y antecedentes familiares, ocuparon un lugar importante; mientras que el nivel significativo de asistencia a controles prenatales, no evitó la aparición del trastorno hipertensivo. (DUAZARY 2013 No. 2, 119 - 126

Experiencias en el aula: segundo encuentro de prácticas pedagógicas innovadoras

Experiencias de profesores en su quehacer en los distintos ambientes de aprendizaje presenciales y a distancia.La segunda entrega de Experiencias en el aula es una publicación anual que recoge las ponencias ganadoras presentadas en el Segundo Encuentro de Prácticas Pedagógicas Innovadoras, organizado por el Centro de Excelencia Docente aeiou, de la Vicerrectoría General Académica de la Corporación Universitaria Minuto de Dios – UNIMINUTO Todas las ponencias publicadas en la segunda entrega de Experiencias en el aula fueron seleccionadas por evaluadores externos durante la convocatoria al Segundo Encuentro de Prácticas Pedagógicas Innovadoras en el que fueron presentadas; este evento, organizado por el Centro de Excelencia Docente aeiou, y la Vicerrectoría General Académica de la Corporación Universitaria Minuto de Dios- UNIMINUTO, tuvo lugar los días 9 y 10 de octubre de 2017

Geodivulgar: Geología y Sociedad 2018

Depto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasFALSEsubmitte

Geodivulgar: Geología y Sociedad

Con el lema “Geología para todos” el proyecto Geodivulgar: Geología y Sociedad apuesta por la divulgación de la Geología a todo tipo de público, incidiendo en la importancia de realizar simultáneamente una acción de integración social entre estudiantes y profesores de centros universitarios, de enseñanza infantil, primaria, de educación especial y un acercamiento con público con diversidad funcional

Validación de un protocolo de evaluación de la fuerza del core a través de dinamometría electromecánica funcional (DEMF)

Introducción: el estudio de la fuerza en el ser humano se ha convertido en un objetivo primordial en las últimas décadas apareciendo herramientas que permiten conocer diferentes variables. Para utilizar un nuevo dispositivo es necesario estudiar su fiabilidad y validez, para posteriormente crear un test y evaluar un movimiento o ejercicio. Objetivo: analizar la validez y fiabilidad de un test para evaluar la fuerza estática y dinámica de los flexores y extensores del tronco a través de dinamometría electromecánica funcional (Dynasystem). Metodología: la presente investigación se puede dividir en dos partes, la primera con un diseño cuantitativo experimental para estudiar la validez y fiabilidad concurrente del dispositivo de medida y la segunda con dos estudios de diseño cuantitativo cuasiexperimental para estudiar la fiabilidad de las diferentes condiciones en la evaluación de la fuerza de los flexores y extensores de tronco. En esta segunda fase participaron treinta y siete estudiantes masculinos voluntarios físicamente activos (edad = 21.4 ± 2.1 años, peso = 69.2 ± 6.9 kg, altura = 1.7 ± 0.1 m e índice de masa corporal = 23.0± 1.6 kg/m2) en el estudio de los flexores y treinta y dos estudiantes masculinos voluntarios físicamente activos (edad = 21.46 ± 2.1 años, peso = 69.22 ± 6.85 kg, altura = 1.73.5 ± 0.07 m e índice de masa corporal = 22.98 ± 1.607 kg/m2 ) en el estudio de los extensores. Se evaluó la fuerza máxima y media de los flexores y extensores del tronco en posición sentado, a tres velocidades de ejecución y en dos rangos de movimientos a través de dinamometría electromecánica funcional para conocer que condición de evaluación era más fiable. Resultados: (I) Los valores de velocidad media tomados con Dynasystem y TForce presenta una correlación prácticamente perfecta (r > 0.99) y bajos errores aleatorios (< 0.06 m·s-1), mientras que los valores de velocidad media son sistemáticamente mayores para Dynasystem (p < 0.05). Dynasystem ofrece una alta o aceptable fiabilidad para la velocidad media (CV ≤ 0.24%), el tiempo en alcanzar la velocidad isocinética (CV rango = 1.68-9.70%) y el tiempo mantenido en la velocidad isocinética (CV rango = 0.53-8.94%). (II) La fiabilidad absoluta y relativa para los protocolos isométricos y dinámico tiene una repetitividad estable con CV inferiores a 10%. La condición más fiable para evaluar la fase concéntrica en los flexores del tronco fue la fuerza media a una velocidad de 0.15 m·s-1 y un rango corto (CV = 6.82 %) y para la fase excéntrica la fuerza máxima a una velocidad de 0.15 m·s-1 y un rango amplio (CV = 5.07%). (III) La manifestación de fuerza más fiable (CV = 11.33 %) para evaluar la contracción concéntrica y excéntrica de los extensores del tronco fue la fuerza media a una velocidad de 0.15 m·s-1 y un rango corto (CV = 11.33 % y 9.52 %) respectivamente. Conclusiones: Dynasystem es un dispositivo valido y fiable para medir la velocidad media y además es fiable en la evaluación de los flexores y extensores de tronco.Introduction: In the last decades, the study of strength in humans has become a primary objective, with the appearance of new devices that allow knowing different variables. To use a new device, it is necessary to study the reliability and validity, to create and evaluate a movement or exercise. Aim: To analyze the validity and reliability of a test to evaluate the static and dynamic strength of the trunk flexors and extensors through a functional electromechanical dynamometry (Dynasystem). Methodology: The present investigation can be divided in two parts, the first with an experimental quantitative design to study the concurrent validity and reliability of the strength device and the second with two quasi-experimental quantitative design studies to study the reliability of the different conditions in the evaluation of the strength of the trunk flexors and extensors. In this second phase, thirty-seven physically active male volunteer students (age = 21.4 ± 2.1 years, weight = 69.2 ± 6.9 kg, height = 1.7 ± 0.1 and body mass index = 23.0 ± 1.6 kg / m2) participated in the study of flexors and thirty and two physically active male volunteer students (age = 21.46 ± 2.1 years, weight = 69.22 ± 6.85 kg, height = 1.73.5 ± 0.07 and body mass index = 22.98 ± 1.607 kg / m2) in the study of the extensors. The maximum and mean strength of the trunk flexors and extensors in a sitting position was evaluated at three velocities and in two ranges of movement through functional electromechanical dynamometry to know which evaluation condition was more reliable. Results: (I) The mean velocity values collected with Dynasystem and T-Force presented practically perfect correlations (r > 0.99) and low random errors (< 0.06 m·s-1), while mean velocity values were systematically higher for Dynasystem (p < 0.05). Dynasystem provided a high or acceptable reliability for mean velocity (CV ≤ 0.24%), time to reach the isokinetic velocity (CV range = 1.68-9.70%) and time spent at the isokinetic velocity (CV range = 0.53-8.94%). (II) The absolute reliability provided a stable repeatability for the isometric and dynamic protocols, with CV being below 10% in nearly all instances. The most reliable strength manifestation (CV = 6.82%) to evaluate the concentric contraction of trunk flexors was mean force with a velocity of 0.15 m·s-1 and a short range and to evaluate the eccentric contraction of trunk flexors was peak force with a velocity of 0.15 m·s-1 and large range (CV = 5.07%). (III) The most reliable strength manifestation (CV = 11.33%) to evaluate the concentric and eccentric contraction of the trunk extensors was the mean force at a velocity of 0.15 m·s-1 and a short range (CV = 11.33% and 9.52%) respectively. Conclusions: Dynasystem is a valid and reliable device for measuring mean velocity and it is also reliable in the evaluation of trunk flexors and extensors.Tesis Univ. Granada.FEDER/Ministerio de Ciencia, Innovación y Universidades RTI2018-099723-B-I00Universidad Católica de la Santísima Concepción. Chile VRIP (-001

Reliability of a standing isokinetic shoulder rotators strength test using a functional electromechanical dynamometer: effects of velocity

Background. The evaluation of the force in internal rotation (IR) and external rotation (ER) of the shoulder is commonly used to diagnose possible pathologies or disorders in the glenohumeral joint and to assess patient’s status and progression over time. Currently, there is new technology of multiple joint isokinetic dynamometry that allows to evaluate the strength in the human being. The main purpose of this study was to determine the absolute and relative reliability of concentric and eccentric internal and external shoulder rotators with a functional electromechanical dynamometer (FEMD). Methods. Thirty-two male individuals (21.46 ± 2.1 years) were examined of concentric and eccentric strength of shoulder internal and external rotation with a FEMD at velocities of 0.3 m s−1 and 0.6 m s−1 . Relative reliability was determined by intraclass correlation coefficients (ICC). Absolute reliability was quantified by standard error of measurement (SEM) and coefficient of variation (CV). Systematic differences across velocities testing circumstances, were analyzed with dependent t tests or repeatedmeasures analysis of variance in case of two or more than two conditions, respectively. Results. Reliability was high to excellent for IR and ER on concentric and eccentric strength measurements, regardless of velocity used (ICC: 0.81–0.98, CV: 5.12–8.27% SEM: 4.06–15.04N). Concentric outcomes were more reliable than eccentric due to the possible familiarization of the population with the different stimuli. Conclusion. All procedures examined showed high to excellent reliability for clinical use. However, a velocity of 0.60 m s−1 should be recommended for asymptomatic male patients because it demands less time for evaluation and patients find it more comfortable