Background: The aim of this study was to analyse the validity and accuracy of the low-cost Xiaomi Mi Band 4 (MB4) fitness tracker in relation to step count and heart rate in free-living conditions. Methods: 46 participants join in this study (38.65 ± 14.36 years old). The MB4 was compared with a video recording in laboratory conditions, also with the Sense Wear and Firstbeat monitors in free-living conditions. Results: No significant differences were found in the number of steps in the laboratory protocol between devices, in both, at low and high walking speed. For the free-living conditions, the MB4 showed high values of convergent validity in relation to the Firstbeat monitor during recording in both rest and walking situations. Moreover, the MB4 showed adequate values of convergent validity with the Sense Wear monitor during the 24 h recording, at medium speeds, and climbing stairs. Conclusion: The accuracy and precision of the MB4 is reasonable and can be used to monitor the average of step count and heart rate in free-living conditions.

Summary: Background: Identifying environmental factors that influence health in children are necessary to develop preventive strategies.Objective: To determine the association between the lifestyles of children (i.e., Mediterranean diet (MD), physical activity (PA), fitness and screen time (ST) with abdominal obesity (AO) of preschoolers from three Spanish‐speaking countries (Chile, Colombia and Spain) with different socioeconomic levels and Human Development Index (HDI) indicators.Material and Methods: This cross‐sectional study included 982 schoolchildren (aged 4–6 years; 56.8% girls) from Chile (n = 409), Colombia (n = 281), and Spain (n = 292). Body mass index (BMI), waist circumference (WC), waist‐to‐height ratio (WtHR), adherence to the MD, PA, ST and physical fitness were evaluated.Results: Spanish preschoolers reported a lower WtHR (p < 0.001), greater physical fitness (Z‐score) (p < 0.001) and higher adherence to the MD (p < 0.001) than their Chilean and Colombian peers. In addition, Colombian preschoolers had a better lifestyle (PA + ST) than their Chilean and Spanish peers (p < 0.001). Chilean preschoolers reported a higher prevalence of AO than the Spanish preschoolers (65% vs. 51.9%;p = 0.001).Conclusion: Lifestyle had a significant association with AO among Spanish‐speaking preschool children, with physical fitness especially being a relevant factor regardless of the country of origin. The findings of the current study may support the development of public guidelines focusing on healthy lifestyles in children to create effective plans that contribute to the early treatment of AO in preschool children.

The aim of this study was to determine the effect of cognitive interference by using the Dual-Task (DT) paradigm on gait parameters according to sex, and age. Additionally, we aim to explore the relationship between Dual-Task-Cost (DTC), physical fitness, cognitive functioning, and weight status in schoolchildren. One hundred schoolchildren participated in this study (age = 8.83 ± 1.82 years). They were randomly assigned to Comfortable Linear Gait (CLG: gait in a straight path) or Complex Gait (CG: gait over obstacles) with and without interference. For CLG, boys and girls showed a reduction in gait speed (p < 0.001), cadence (p < 0.01), and step length (p < 0.001). In addition, double support time (p < 0.05) and cadence coefficient of variance (boys= p < 0.01; girls= p < 0.05) increased in the DT condition. In the CG, both sexes (p < 0.001) exhibited a worse execution time. There were significant effects on speed DTC between 8-9 vs. 10-11 years in CLG and 6-7 vs. 10-11 years in CGT (p < 0.05). In conclusion, gait parameters during CLG and CG are modified in the DT condition, resulting in a slower gait with shorter steps, regardless of age and sex. DTC is associated with physical fitness and cognitive function.

Purpose: To analyze the effects of a 6-week multidomain walking training program (MWTP) with mHealth technology on health status, cognitive performance, and physical function in older adults. Design: Controlled longitudinal intervention study with pre- and post-intervention assessments. Setting: Community-based, autonomous outdoor environments. Sample: Forty-nine sedentary older adults (mean age 69.9 ± 3.7 years) allocated to an experimental ( n = 21) or control group ( n = 28). Intervention: The experimental group followed a 6-week mHealth-supported MWTP combining endurance, strength, and dual-task cognitive exercises, with progressive intensity and volume. The control group maintained usual routines. Measures: Physical fitness (lower limb strength, walking speed, cardiorespiratory capacity), cognitive function (executive function), and health variables (anthropometric and psychosocial) were assessed using standardized tests. Analysis: Data were analyzed using SPSS v.19.0. Descriptive statistics, normality and homogeneity tests, and appropriate parametric (2 × 2 repeated-measures ANOVA, ANCOVA) and non-parametric (Mann–Whitney U, Wilcoxon) tests were applied (α < 0.05). Results: The experimental group showed significant improvements in lower limb strength, walking speed, and cardiorespiratory capacity. Executive function was preserved in the experimental group but declined in the control group. No significant changes were found in anthropometric or psychosocial measures. Conclusion: The MWTP enhances physical fitness and preserves executive function in older adults. Its autonomous, mHealth-supported format offers a scalable and cost-effective strategy for promoting healthy aging.

El objetivo de este estudio fue Analizar la relación existente entre el número de pasos, la frecuencia cardiaca, la calidad del sueño y las calorías medidas a diario con respecto a variables de salud, calidad de vida y nivel de actividad física en personas mayores de 60 años. Un total de 54 participantes formaron parte de este estudio (67,19 ± 9,01 años). El número de pasos, frecuencia cardiaca y niveles de sueño se registraron a través de la pulsera Xiaomi Mi Band 4.0. Las variables de salud a través de cuestionarios físicos y cognitivos. Los resultados muestran que aquellos participantes con un mayor nivel de actividad física obtienen un valor promedio más alto en las variables de físicas y cognitivas, aunque no se encontraron diferencias significativas en la comparación por sexo. En conclusión, los adultos mayores que dan más pasos semanales tienen una mejor condición física y cognitiva que aquellos que tienen un estilo de vida más sedentario. Las mujeres obtienen valores más altos en las variables físicas y cognitivas que los hombres.

El objetivo fue describir la importancia hacia las clases de Educación Física y la intención de ser físicamente activo entre sexos, así como su asociación con el nivel de AF semanal autopercibida. Un total de 77 estudiantes entre 13-15 años de ESO (edad media= 13.47 ± 0.563). Para valorar el grado de importancia y utilidad hacia las clases de Educación Física se utilizó el cuestionario IEF, la intención de ser físicamente activo se evaluó a través del cuestionario MIFA y se registró el nivel de AF moderada-vigorosa semanal autopercibida. Los resultados mostraron que los hombres obtuvieron medias más altas en la importancia atribuida a las clases de EF con respecto a las mujeres (p <0.05). Además, se observó una fuerte asociación entre los instrumentos IEF (r = 0.326; p= 0.004), MIFA (r = .960, = 75; p <0.001) y promedio de AF (r = 0.389, p= 0.001). Los chicos otorgan mayor importancia a las clases de EF lo que sugiere la necesidad de desarrollar estrategias que aumenten el interés de las chicas para promover una mayor intención de ser físicamente activas.