Hormazábal Aguayo, Ignacio
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Hormazábal Aguayo
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Ignacio
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Ciencias de la Salud
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Publication Open Access A before-school physical activity intervention to improve cognitive parameters in children: The Active-Start study(Wiley, 2019-08-19) García Hermoso, Antonio; Hormazábal Aguayo, Ignacio; Fernández Vergara, Omar; González-Calderón, Nicole; Russell-Guzmán, Javier; Vicencio-Rojas, Francisca; Chacana-Canas, Cesar; Ramírez Vélez, Robinson; Ciencias de la Salud; Osasun ZientziakThe aim of the study was threefold: (a) to test a before-school physical activity intervention (Active-Start) on academic performance, selective attention, and concentration capacity; (b) to test the effect of the Active-Start intervention on anthropometry, body composition, and physical fitness parameters; and (c) whether the physical fitness components are moderators of the effect of the Active-Start program on academic performance, selective attention, and concentration capacity in Chilean children. The Active-Start intervention was a RCT which comprised 170 children (8-10 years old) from three public schools with low socioeconomic status from the city of Santiago (Chile). The exercise intervention was delivered daily, before starting the first school-class (8:00-8:30 am) for 8 weeks. Changes in academic performance, selective attention and concentration capacity, anthropometric, body composition, and physical fitness parameters were measured. The analyses used were mixed regression models for repeated measures over time. No statistically significant changes in attention and concentration capacity were found. However, significant changes were seen in language (0.63; 95% CI 0.49-0.77) and mathematics (0.49; 95% CI 0.32-0.66) performance (P < .001). Also, improvements were seen in fat mass, fat-free mass, muscular, and cardiorespiratory fitness (all P < .05). The Johnson-Neyman technique revealed a significant relationship between the effect of intervention and attention and concentration when change in cardiorespiratory fitness was above, but not below, 3.05 and 0.70 mL/kg/min, respectively. Implementing before-school physical activity programs such as the Active-Start to enhance the cardiorespiratory fitness may benefit attention capacity and academic success among schoolchildren.Publication Embargo Physical fitness and activity levels as predictors of subjective well-being in youths with type 1 diabetes mellitus: a 2-year longitudinal analysis of the diactive-1 cohort study(Wiley, 2025-03-05) Muñoz Pardeza, Jacinto; López Gil, José Francisco; Huerta Uribe, Nidia; Hormazábal Aguayo, Ignacio; Yáñez-Sepúlveda, Rodrigo; Ezzatvar, Yasmin; Izquierdo Redín, Mikel; García Hermoso, Antonio; Ciencias de la Salud; Osasun ZientziakSubjective well-being (SWB), including cognitive and affective components, may be influenced by the management of type 1diabetes mellitus (T1DM). Physical fitness and adherence to physical activity (PA) are associated with better glycaemic stabilityand diabetes management. However, the relationship with SWB is not yet understood. The aim of the study was to determinethe relationship between physical fitness, PA, and SWB over two years in youths with T1DM. This longitudinal study involved83 participants (aged 6–18 years; 44.6% girls) from the Diactive-1 Cohort. Physical fitness was assessed by spirometry (peak ox-ygen consumption) and dynamometry (handgrip strength). PA domains were measured using triaxial accelerometers, whereasthe number of days participating in muscle-strengthening activities was assessed using a question. The Cuestionario Único deBienestar Escolar was used to determine SWB. Glycaemic stability was determined when glycosylated hemoglobin < 7%, coef-ficient of variability ≤ 36%, and time-in-range target > 70% were met. The linear mixed models used considered three assess-ments and subject variability, showing significant associations between overall physical fitness (unstandardized beta coefficient[B] = 1.778, 95% confidence interval [CI] 0.413–3.158; p = 0.012) and total PA (B = 0.034, 95% CI 0.005–0.063; p = 0.020) withSWB. Although time did not moderate the association with physical fitness (p = 0.116), this was true for PA only in the secondyear (p = 0.020). In contrast, glycaemic stability did not moderate the associations (p > 0.05). In conclusion, physical fitness andPA are associated with greater SWB in young people with T1DM, which may play a role in the psychological aspects of diseasemanagement.