Natali Mira - Academia.edu (original) (raw)

Papers by Natali Mira

Instituto Tecnológico Metropolitano, 2017

espanolEl tiro con arco es una disciplina deportiva de competicion olimpica y paralimpica que con... more espanolEl tiro con arco es una disciplina deportiva de competicion olimpica y paralimpica que consiste en propulsar una cantidad determinada de flechas con precision hacia el centro de un objetivo llamado diana; teniendo en cuenta las propiedades biomecanicas del aparato locomotor humano. Objetivos: Brindar un analisis biomecanico comparativo del gesto deportivo del tiro con arco compuesto con diana entre 2 arqueros profesionales, uno olimpico y otro paralimpico, con el fin de distinguir los cambios existentes en la ejecucion de la tecnica de esta disciplina; y asi mismo, determinar la existencia de posibles ventajas biomecanicas que implican las adaptaciones realizadas en la ejecucion del gesto tecnico del para-arquero. EnglishArchery is an Olympic and Paralympic sport whose objective is to accurately propel a number of arrows to the center of a target; taking into account the biomechanical properties of the human locomotor apparatus. Objectives: This work seeks to provide a compar...

Colombia Médica : CM, 2021

Background: Postural stability enables humans to maintain the center of mass of their body within... more Background: Postural stability enables humans to maintain the center of mass of their body within their base of support. Nevertheless, over time, such stability is affected by different factors such as age, repetitive strain, and accidents. Although studies in this field have investigated the effectiveness of hydrotherapy, only a few of them have explored its influence on postural stability, which is reflected in a lack of research that estimates its impact on rehabilitation. Aim: To determine the immediate and final effects of an aquatic routine protocol on the postural stability of elderly subjects. Methods: The postural stability of 20 adults over 60 years of age was analyzed using electromyographic and baropodometric methods. Electromyographic signals were obtained from the tibialis anterior, soleus, both gastrocnemius, vastus medialis, and biceps femoris to calculate the coactivation percentage of the muscles in charge of postural stability. The baropodometric data were collect...

Osteoarthritis is one of the most prevalent degenerative diseases in the elderly that affects the... more Osteoarthritis is one of the most prevalent degenerative diseases in the elderly that affects the structural and functional integrity of the musculoskeletal system. Currently, hydrotherapy is taking relevance for osteoarthritis treatment due to its possible efficacy on pain relief and functionality. This therapy can be evaluated by means of an electromyographic analysis. The objective is to show a database of lower limbs muscles electrical activity in charge of postural stability, comparing the difference between hydrotherapy and conventional therapy through surface electromyography. A signal acquisition methodology was developed measuring electromyographic activity of the Tibialis Anterior, Soleus, Vastus Medialis, Biceps Femoris, Medial Gastrocnemius and Lateral Gastrocnemius muscles, before and after applying a specific exercise routine for knee osteoarthritis. This routine consisted of 12 therapy sessions spread over 4 weeks and could be done in water and on land. The data is or...

A major challenge posed by the global crisis caused by the health contingency due to COVID-19 has... more A major challenge posed by the global crisis caused by the health contingency due to COVID-19 has been to design, manufacture, and distribute basic personal protective equipment among health professionals The considerations described in this technical note are aimed at optimizing the design and digital manufacturing of 3D printed face protection shields composed of polylactic acid (PLA) headbands and transparent polymerizable vinyl chloride (PVC) film The headband dimensions were determined by anthropometric parameters, thus establishing the distance to be used with glasses and mouthpieces without sacrificing the user’s peripheral vision The behavior of the material was evaluated under different stresses using finite element analysis As a result, the optimal values for layer height, line width, wall thickness, fill density, and print speed were defined However, these parameters caused a decrease in production times The face shields were sanitized before, during, and after the assemb...

Background: Many work-related accidents and diseases that affect nursing assistants’ health and t... more Background: Many work-related accidents and diseases that affect nursing assistants’ health and the economy of companies are attributed to manual load handling. Among the available methods to analyses these tasks, NIOSH is one of the most commonly adopted. Furthermore, the implementation of biomechanical techniques enables to create and assess records that quantify the complexity of injuries. The objective is to evaluate the biomechanics of manual patient handling by the NIOSH method complemented with electromyography of the lumbar region and videogrammetry of the gesture. Methods: In a simulated work environment a patient was lifted to a gurney while the stability of the dorsolumbar region was calculated using electromyography. At the same time, the kinematics of the main joints involved in the gesture were recorded using videogrammetry. These data were compared with those of the NIOSH method to establish the main factors that may have an influence on the performance of manual load...

Temperature is one of the most common indicators of the structural health of devices and componen... more Temperature is one of the most common indicators of the structural health of devices and components. In recent times, infrared thermography has become a mature and widely accepted monitoring technique to measure temperatures in real time in a non-contact manner. In the clinical context, it is also used to study some diseases or the mechanical behavior of endoprostheses. However, the assessment of exoprostheses has been limited to gait analysis or the study of their interaction with residual limbs. The aim of this work is to assess thermography as a tool for evaluating mechanical stresses in a transtibial prosthesis through the development of a protocol that allows the identification of critical points. A transtibial prosthesis was recorded undergoing mechanical stress during the stance phase using a device that simulates the human gait and a thermal camera. A protocol was developed to detect critical thermal points that could reveal areas with the greatest concentration of such stre...

Ciencia e Innovación en Salud

Background: Many work-related accidents and diseases that affect nursing assistants’ health and... more Background: Many work-related accidents and diseases that affect nursing assistants’ health and the economy of companies are attributed to manual load handling. Among the available methods to analyses these tasks, NIOSH is one of the most commonly adopted. Furthermore, the implementation of biomechanical techniques enables to create and assess records that quantify the complexity of injuries. The objective is to evaluate the biomechanics of manual patient handling by the NIOSH method complemented with electromyography of the lumbar region and videogrammetry of the gesture. Methods: In a simulated work environment a patient was lifted to a gurney while the stability of the dorsolumbar region was calculated using electromyography. At the same time, the kinematics of the main joints involved in the gesture were recorded using videogrammetry. These data were compared with those of the NIOSH method to establish the main factors that may have an influence on the performance of manual lo...

TecnoLógicas

Uno de los grandes retos que ha traído consigo la crisis mundial provocada por la contingencia sa... more Uno de los grandes retos que ha traído consigo la crisis mundial provocada por la contingencia sanitaria, debida a la COVID-19, ha sido el diseño, la fabricación y distribución de elementos básicos de protección para el personal médico y sanitario que hace parte de los equipos de salud. Las consideraciones aportadas por la siguiente nota técnica tienen el objetivo de optimizar el diseño y la fabricación digital de pantallas de protección facial de impresión en 3D, creando diademas en ácido poliláctico (PLA) y lámina de cloruro de vinilo polimerizable transparente (PVC). Bajo parámetros antropométricos se determinaron las dimensiones de la diadema, determinando así la distancia para su uso con gafas y tapabocas sin sacrificar la visión periférica del usuario. A través de análisis de elementos finitos, se evaluó el comportamiento del material frente a diferentes esfuerzos., Así se definieron variables óptimas de grosor para altura de capa, ancho de línea, grosor de la pared, densidad ...

Prosthetics and Orthotics International

Background: Mechanical behavior is difficult to monitor in experimental environments, usually bec... more Background: Mechanical behavior is difficult to monitor in experimental environments, usually because of geometric or technology implementation limitations. Nevertheless, thermography has been shown to overcome these issues. Objectives: The aim of this study was to evaluate four types of assemblies between a Jaipur foot and a polyethylene tube using infrared thermography in order to find the best mechanical configuration in terms of thermal behavior. Study Design: Mechanical testing. Technique: An infrared camera captured short videos every 5 min over 10 h in six different positions (three in the back and three in front of the Jaipur foot) around a prosthesis subjected to repetitive stresses (axial force 980 N) simulating kinematic variables like joint angles. We established a region of interest around the foot–ankle assemblies and calculated maximum temperatures and thermographic indices. Results: In this study, the best foot–ankle assembly used epoxy adhesive because it presented ...

Comunicaciones en Estadística

La artrosis u osteoartritis es una de las enfermedades degenerativas más prevalentes en el adulto... more La artrosis u osteoartritis es una de las enfermedades degenerativas más prevalentes en el adulto mayor que afecta la integridad estructural y funcional del sistema musculoesquelético. A pesar de no existir una cura conocida para la artrosis, los síntomas se pueden mejorar por medio de ejercicios terapéuticos. En la actualidad una de las terapias que está tomando relevancia es la hidroterapia por su eficacia a corto plazo sobre el dolor y la función, debido principalmente a la disminución de los efectos de la gravedad y a la temperatura a la cual se acondiciona el medio que mejoran el flujo sanguíneo y facilitan la relajación muscular. Sin embargo, pocos estudios han examinado la influencia de la inmersión en agua sobre la estabilidad muscular, siendo gran parte de esta investigación anecdótica, y la que existe a nivel científico difiere en los métodos aplicados debido a la ausencia de protocolos estandarizados para evaluar el impacto de los recursos acuáticos terapéuticos y su pape...

Apunts Educación Física y Deportes

The overall objective of this work is to compare the differences between the execution of snatche... more The overall objective of this work is to compare the differences between the execution of snatches performed by high-performance male and female weightlifters as well as the lateral symmetry of the gesture through the 2D reconstructions of the kinematics. Seventeen weightlifters (6 women and 11 men) from "Liga Antioqueña de Levantamiento de Pesas" participated in this study. Their movements were captured in the frontal and sagittal plane by means of 2D videogrammetry. The articular kinematics of both men and women present the same bilateral symmetry. However, the transition and turnover phases exhibited the most significant changes. Differences between the two study groups can be found in their joint movement range, barbell vertical velocity, and base of support; the latter two were greater in women. This changes can be useful to provide coaches with basic biomechanical tools to improve their practice and to personalize training.

Journal of Dance Medicine & Science

Journal of Dance Medicine & Science, 2019

Dancers are highly trained athletes who are at significant risk of injury due to the repetitive n... more Dancers are highly trained athletes who are at significant risk of injury due to the repetitive nature of their movement patterns. Most ballet injuries result from overuse and occur in the lower limbs. Therefore, the behavior of the lower limbs during a basic ballet movement should be studied in order to identify and subsequently correct mechanical factors that may contribute to injuries. This study analyzed a cou-de-pied derrière with demi-plié to piqué arabesque gesture executed by 18 ballet dancers identified in two groups: experienced dancers (EDs) and beginner dancers (BDs). Kinematic, baropodometric, and electromyographic analyses enabled the observation of differences between these study groups with regard to joint angles, velocities, foot pressure behavior, and muscle activation during execution of the gesture. Experienced dancers reached greater hip and lumbar spine hyperextension and demonstrated less forward torso flexion, which enables better execution of the gesture compared to BDs. The highest foot pressure in both groups was found in the first metatarsal, with a tendency toward the great toe. In terms of muscular activation, BDs exhibited lower electrical activity than EDs. It is concluded that: 1. ankle and knee angles in demi-plié are not defined by dancers' expertise; 2. the faster the leg is raised during piqué-arabesque the better the gesture; 3. special attention to the metatarsal heads is required due to the high pressures found in this study; and 4. activation of different muscle groups depends on the complexity of the gesture and dancer's expertise.