Repositorio Institucional

El Repositorio Institucional de la Universidad Viña del Mar es un espacio de almacenamiento, preservación y difusión del material documental producido por académicos y estudiantes en las áreas de docencia, investigación y vinculación con el medio.

En este espacio podrá encontrar: artículos de revistas, reportes de investigación, tesis de pre y postgrado, material docente, documentación académica y aportes de miembros de nuestra Universidad en Medios de Comunicación nacionales y regionales.

Recent Submissions

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Nivel de actividad física y estado de ánimo en universitarios durante el confinamiento por la COVID-19
(2023-05-19) Orrego-Orrego, Daniel; Cortés-Roco, Guillermo; Guerrero-Henríquez, Juan; Toledo-Lara, José; Jímenez-Pavez, Soledad; Duclos-Bastías, Daniel; Yáñez-Sepúlveda, Rodrigo
Introducción: La pandemia de la COVID-19 ha generado problemas de salud física y mental en los universitarios. Objetivos: Determinar la relación entre nivel de actividad física y estado de ánimo en estudiantes universitarios durante el confinamiento por la COVID-19. Métodos: Participaron 215 estudiantes universitarios, edad 22,09 ± 2,61 (108 mujeres y 107 hombres) durante el confinamiento por la COVID-19. Fueron aplicados instrumentos en formato digital durante el mes de junio del año 2020. El nivel de actividad física se evaluó utilizando el Cuestionario Internacional de Actividad Física (IPAQ), forma corta, y el estado de ánimo se evaluó con la Escala de Valoración del Estado de Ánimo (EVEA). Resultados: Estado de ánimo alegría presentó una correlación positiva significativa con todas las variables de actividad física, excepto con tiempo sentado. Estado de ánimo tristeza-depresión presentó una correlación negativa con equivalente metabólico de actividad física vigorosa (r -0,201; p= 0,003) y equivalente metabólico total (r -0,172; p= 0,011). Estado de ánimo ansiedad se correlacionó negativamente con equivalente metabólico de actividad física vigorosa (r -0,163; p= 0,017) y equivalente metabólico total (r -0,162; p= 0,018). Conclusiones: El nivel de actividad física se relaciona positivamente con el estado de ánimo, principalmente con el nivel de alegría, sin embargo, estas correlaciones presentan un tamaño del efecto pequeño.
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La labor docente de las profesoras de educación física en el contexto de la pandemia de COVID-19. Estudio de caso en un centro educativo
(2023-09-15) Paéz, Jacqueline; Herrera, Gustavo; Rolle, Grissel; Yañez, Rodrigo; Reyes, Tomas; Cortes, Guillermo; Hurtado Almonacid, Juan
La pandemia de COVID-19 puso de manifiesto los retos a los que se enfrentan las mujeres que trabajan como profesoras, madres y amas de casa: (1) Propósito: Esta investigación tuvo como objetivo conocer las experiencias docentes de profesoras de educación física de un colegio particular de la comuna de Viña del Mar, Chile, durante la pandemia; (2) Métodos: Se utilizó un enfoque cualitativo con un diseño fenomenológico con ocho informantes seleccionadas de manera intencional y por conveniencia, y se recolectaron datos a través de entrevistas semiestructuradas.; (3) Resultados: las participantes tuvieron que adaptar sus prácticas, priorizando los contenidos de motricidad y condición física e implementando nuevas estrategias con plataformas digitales. El rol de mujeres y madres fue un desafío para el trabajo profesional docente y el desarrollo de las clases e-learning fue visto como una situación de aprendizaje constante. (4) Conclusiones: Las mujeres docentes también tuvieron que cumplir con múltiples tareas asociadas a su género, al mismo tiempo que innovar, capacitarse y organizarse para sobrevivir en su labor profesional.
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Effects of a multi-professional intervention on body composition, physical fitness and biochemical markers in overweight COVID-19 survivors: a clinical trial
(2023-08-27) Sordi, Ana Flávia; Medeiros Lemos, Maurício; de Souza Marques, Déborah Cristina; Ryal, Joed Jacinto; Silva Lalucci, Marielle Priscila de Paula; Guiraldi Marques, Marilene; Amaro Camilo, Maria Luiza; Ramos, Solange De Paula; Franzói De Moraes, Solange Marta; Valdés-Badilla, Pablo; Mota, Jorge; Magnani Branco, Braulio Henrique
Introduction: The sequelae post-COVID can affect different systems. In this sense, considering the multi-factorial etiology of COVID-19, multi-professional interventions could be a relevant strategy for recovery health indicators. Objective: This study aimed to investigate the effects of multi-professional intervention on body composition, physical fitness, and biomarkers in overweight COVID-19 survivors with different symptomatology. Methodology: A non-randomized parallel group intervention included 69 volunteers (BMI ≥25 kg/m2), divided into three groups according to SARS CoV-2 symptomatology, but only 35 finished the longitudinal protocol [control group (n = 11); moderate group (n = 17) and severe group (n = 7)]. The groups were submitted to a multi-professional program (nutritional intervention, psychoeducation, and physical exercise intervention) for 8 weeks, and the volunteers underwent body composition assessments (primary outcome) and physical and biochemical tests (secondary outcome) in pre- and post-intervention. This study was registered on the Clinical Trials Registration Platform number: RBR-4mxg57b and with the local research ethics committee protocol under number: 4,546,726/2021. Results: After the 8-week multi-professional intervention, the following results were observed for the moderate COVID-19 group: improved dynamic strength of lower- and (p = 0.003), upper-limbs (p = 0.008), maximal isometric lumbar-traction strength (p = 0.04), flexibility (p = 0.0006), and albumin (p = 0.0005), as well as a reduction in the C reactive protein (CRP) (p = 0.003) and fasting glucose (p = 0.001); for the severe COVID-19 group: an improvement in dynamic lower-body strength (p = 0.001), higher values of albumin (p = 0.005) and HDL-c (p = 0.002), and lower values of CRP (p = 0.05), and for the control group: an improvement in sit-up repetitions (p = 0.008), and a reduction of CRP (p = 0.01), fasting glucose (p = 0.001) and total cholesterol (p = 0.04) were identified. All experimental groups reduced triglycerides after intervention (p < 0.05). Conclusion: Finally, 8 weeks of multiprofessional intervention can be an efficient tool for reversing the inflammatory process and promoting improvements in daily activities and quality of life, although it is believed that the severe COVID-19 group needs longer interventions to improve different health indicators.
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La ciudad neoliberal y sus pasados presentes: Un diálogo Sur-Sur
(2023-08) Colin, Clément; Pinto Baleisan, Carolina; Núñez Carrasco, Lorena
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Narrative review: The role of circadian rhythm on sports performance, hormonal regulation, immune system function, and injury prevention in athletes
(2023-09-01) Nobari, Hadi; Azarian, Somayeh; Saedmocheshi, Saber; Valdés-Badilla, Pablo; García Calvo, Tomás
Objectives: This study was a narrative review of the importance of circadian rhythm (CR), describes the underlying mechanisms of CR in sports performance, emphasizes the reciprocal link between CR, endocrine homeostasis and sex differences, and the unique role of the circadian clock in immune system function and coordination. Method: As a narrative review study, a comprehensive search was conducted in PubMed, Scopus, and Web of Science (core collection) databases using the keywords "circadian rhythm", "sports performance", "hormonal regulation", "immune system", and "injury prevention". Inclusion criteria were studies published in English and peer-reviewed journals until July 2023. Studies that examined the role of CR in sports performance, hormonal status, immune system function, and injury prevention in athletes were selected for review. Results: CR is followed by almost all physiological and biochemical activities in the human body. In humans, the superchiasmatic nucleus controls many daily biorhythms under solar time, including the sleep-wake cycle. A body of literature indicates that the peak performance of essential indicators of sports performance is primarily in the afternoon hours, and the evening of actions occurs roughly at the peak of core body temperature. Recent studies have demonstrated that the time of day that exercise is performed affects the achievement of good physical performance. This review also shows various biomarkers of cellular damage in weariness and the underlying mechanisms of diurnal fluctuations. According to the clock, CR can be synchronized with photonic and non-photonic stimuli (i.e., temperature, physical activity, and food intake), and feeding patterns and diet changes can affect CR and redox markers. It also emphasizes the reciprocal links between CR and endocrine homeostasis, the specific role of the circadian clock in coordinating immune system function, and the relationship between circadian clocks and sex differences. Conclusion: The interaction between insufficient sleep and time of day on performance has been established in this study because it is crucial to balance training, recovery, and sleep duration to attain optimal sports performance.