Examinando por Autor "Jerez Mayorga, Daniel"
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Ítem Response of obese schoolchildren to high-intensity interval training applied in the school context(Sociedad Española de Edocrinología y Nutrición, 2019) Espinoza Silva, José M.; Latorre Román, Pedro A.; Párraga Montilla, Juan A.; Caamaño Navarrete, Felipe; Jerez Mayorga, Daniel; Delgado Floody, PedroBackground: High-intensity interval training (HIIT) has been widely used to fight cardiovascular risk factors in adolescents and adults, but no data are available on its applicability in children. Objective: To assess the effects of HIIT on different anthropometric and cardiovascular parameters of overweight and obese children aged 7---9 years. Subjects and methods: Four groups were formed: 1) an overweight control group (OWCG, n = 30, BMI = 21.60 ± 3.72 kg/m2), 2) an obesity control group (OCG, n =34, BMI = 23.92)±3.11 kg/m2), 3) an overweight intervention group (OWIG, n = 69, BMI = 20.01±1.88 kg/m2), and 4) an obesity intervention group (OIG, n = 141, BMI = 24.12±2.66 kg/m2). BMI, body fat (BF), waist circumference, height-waist ratio, systolic (SBP) and diastolic (DBP) blood pressure and cardiorespiratory fitness (CRF, were assessed before and after intervention. Results: There were significant differences in BMI (P < 0.001), BF (P < 0.001), and CRF (P < 0.001) between the groups (control vs intervention) before and after intervention (OWCG vs OWIG and OCG vs OIG). BMI decreased in the OWIG (BMI, 20.01±1.88 at baseline vs 19.00±2.02 after HIIT, P < 0.001) and OIG (BMI, 24.12±2.66 at baseline vs 23.23±3.23 after HIIT, P < 0.001) groups. Similarly, BF decreased in the OWIG (BF, 21.84±4.97 at baseline vs 19.55±4.81 % after HIIT, P < 0.001) and OIG (BF, 30.26 ±11.49 at baseline vs 26.81±6.80 % after HIIT, P < 0.001) groups. CRF improved in both intervention groups (P < 0.001). There was a significant decrease in the prevalence rate of schoolchildren with obesity (from 66.4% to 49.6%) (P < 0.001). Conclusion: The intervention conducted in the school setting improved the anthropometric and cardiovascular parameters of schoolchildren, and also allowed for reducing the proportion of schoolchildren with obesity.Ítem Selective Attention and Concentration Are Related to Lifestyle in Chilean Schoolchildren(MDPI, 2021-09-27) Caamaño Navarrete, Felipe; Latorre Román, Pedro; Párraga Montilla, Juan A.; Jerez Mayorga, Daniel; Delgado Floody, PedroThe objective of this investigation was to determine the association between selective attention and concentration with physical fitness (i.e., cardiorespiratory fitness (CRF), VO2max, the standing long jump test (SLJ) and handgrip muscle strength (HGS)), lifestyle parameters (i.e., physical activity (PA) level, screen time (ST), sleep duration and food habits) and anthropometric measures (i.e., body mass index (BMI) and waist circumference (WC)) among Chilean schoolchildren. Two hundred and forty-eight schoolchildren (137 boys, 111 girls, 11.80 ± 1.17 and 11.58 ± 1.09 years, respectively) participated. Selective attention, concentration and lifestyle (PA, ST, sleep duration and Mediterranean diet (MD) adherence) were determined using a standard questionnaire. CRF, SLJ, HGS and anthropometric indicators (BMI and WC) were also measured. Selective attention showed a positive association with MD adherence score (β; 5.012, p = p < 0.05). Concentration was linked inversely to ST (β; −5.498, p = p < 0.05). Likewise, concentration presented a positive association with MD adherence (β; 2.904, p = p < 0.05). In conclusion, children’s lifestyles are related to the selective attention and concentration of children; therefore, promoting healthy habits could be a cost-effective strategy in the promotion of cognitive development, as it relates to selective attention and concentration.