Examinando por Autor "Jerez-Mayorga D."

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  • Miniatura
    Ítem
    Food habits and screen time play a major role in the low health related to quality of life of ethnic ascendant schoolchildren
    (MDPI AG, 2020-11) Delgado-Floody P.; Caamaño-Navarrete F.; Guzmán-Guzmán I.P.; Jerez-Mayorga D.; Martínez-Salazar C.; Álvarez C.
    The objective of the present study was to determine the association between lifestyle parameters (i.e., physical activity (PA) level, screen time (ST), fitness and food habits) and health-related quality of life (HRQoL) in ethnic ascendant schoolchildren (i.e., Mapuche ascendant). This cross-sectional study included 619 schoolchildren with ethnic (EA; n = 234, 11.6 ± 1.0 years) and non-ethnicity ascendant (NEA; n = 383, 11.7 ± 1.1 years) from Araucanía, Chile. HRQoL and lifestyle were measured using a standard questionnaire and cardiometabolic markers (body mass index (BMI), waist circumference (WC), waist-to-height ratio (WtHR), systolic (SBP) and diastolic blood pressure (DBP)) and cardiorespiratory fitness (CRF) were additionally included. In the EA schoolchildren, the HRQoL reported association with CRF adjusted by age and sex (β; 0.12, p = 0.018) and non-adjusted with foods habits (β; 0.11, p = 0.034). By contrast, ST adjusted by age and sex presented an inverse association with HRQoL (β; −2.70, p < 0.001). EA schoolchildren showed low HRQoL (p = 0.002), low nutritional level (p = 0.002) and low CRF (p < 0.001) than NEA peers. Moreover, children’s ethnic presence showed an association with low nutritional levels (odd ratio (OR): 3.28, p = 0.002) and ST 5 h/day (OR: 5.34, p = 0.003). In conclusion, in the present study, EA schoolchildren reported lower HRQoL than NEA schoolchildren, which could be explained by the lifestyle patterns such as a low nutritional level and more ST exposure. © MDPI AG. All rights reserved.
  • Miniatura
    Ítem
    Reliability of low-cost near-infrared spectroscopy in the determination of muscular oxygen saturation and hemoglobin concentration during rest, isometric and dynamic strength activity
    (MDPI AG, 2020-12) Miranda-Fuentes C.; Guisado-Requena I.M.; Delgado-Floody P.; Arias-Poblete L.; Pérez-Castilla A.; Jerez-Mayorga D.; Chirosa-Rios L.J.
    Background: The objective of this study was to establish the reliability of the Humon Hex near-infrared reflectance spectroscopy (NIRS) in determining muscle oxygen saturation (SmO2) and hemoglobin concentration (Hgb) at rest and during isometric and dynamic strength exercises using a functional electromechanical dynamometer (FEMD). Methods: The SmO2 and Hgb values of sixteen healthy adults (mean ± standard deviation (SD): Age = 36.1 ± 6.4 years) were recorded at rest and during isometry (8 s), dynamic strength I (initial load of 40% of the average isometric load, with 2 kg increments until muscle failure) and dynamic strength II (same as I, but with an initial load of 40% of the maximum isometric load) activity. To evaluate the reliability in the determination of SmO2 and Hgb of this device, intraclass correlation coefficient (ICC), standard error of measurement (SEM) and coefficient of variation (CV) were obtained. Results: The main results obtained are SmO2 at rest (CV = 5.76%, SEM = 3.81, ICC = 0.90), isometric strength (CV = 3.03%, SEM = 2.08, ICC = 0.92), dynamic strength I (CV = 10.6, SEM = 7.17, ICC = 0.22) and dynamic strength II (CV = 9.69, SEM = 6.75, ICC = 0.32); Hgb at rest (CV = 1.97%, SEM = 0.24, ICC = 0.65), isometric strength (CV = 0.98%, SEM = 0.12, ICC = 0.96), dynamic strength I (CV = 3.25, SEM = 0.40, ICC = 0.54) and dynamic strength II (CV = 2.74, SEM = 0.34, ICC = 0.65). Conclusions: The study shows that Humon Hex is a reliable device to obtain SmO2 and Hgb data in healthy adult subjects at rest and during isometric strength, providing precision for measurements made with this device. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
  • Miniatura
    Ítem
    The use of a cooperative-learning activity with university students: A gender experience
    (MDPI, 2020-11) Baena-Morales S.; Jerez-Mayorga D.; Fernández-González F.T.; López-Morales J.
    The UN Sustainable Development Goals (SDG) show how education is essential for creating values in students. In particular, SDG 4 (quality education) and SDG 5 (gender equality) indicate how co-education should be a sustainable benchmark. Co-educational methodologies have been studied for decades. Among them, cooperative learning is considered a valid technique for developing social relations and competences. This study aims to describe and characterize the gender differences between university students regarding their impressions and behaviors when working cooperatively. One hundred and seventy-seven university students (98 women and 79 men), from Physical Education and Primary Education degree courses, worked with Aronson’s Jigsaw technique. After its completion, they completed a questionnaire to analyze cooperative work in higher education (ACOES). The results are organized into seven dimensions. The main gender differences found show that women gave a higher evaluation to relating cooperative learning to future teaching roles (p = 0.017) and to understanding the need for cooperative tasks (p = 0.035). Additionally, female students prefer groups to be organized according to academic criteria and that they should remain stable throughout the academic period. Both genders value Aronson’s Jigsaw as a good method for developing social competences, although they are more neutral when considering it effective at improving academic performance. These findings help to generate a gender-cooperation profile that will enable future research to discuss results more accurately. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.