Contribution of individual and environmental factors to physical activity level among Spanish adults.

BACKGROUND: Lack of physical activity (PA) is a major risk for chronic disease and obesity. The main aims of the present study were to identify individual and environmental factors independently associated with PA and examine the relative contribution of these factors to PA level in Spanish adults. METHODOLOGY/PRINCIPAL FINDINGS: A population-based cross-sectional sample of 3,000 adults (18-75 years old) from Gran Canaria (Spain) was selected using a multistage stratified random sampling method. The participants were interviewed at home using a validated questionnaire to assess PA as well as individual and environmental factors. The data were analyzed using bivariate and multivariate logistic regression. One demographic variable (education), two cognitive (self-efficacy and perceived barriers), and one social environmental (organized format) were independently associated with PA in both genders. Odds ratios ranged between 1.76-2.07 in men and 1.35-2.50 in women (both p<0.05). Individual and environmental factors explained about one-third of the variance in PA level. CONCLUSIONS/SIGNIFICANCE: Self-efficacy and perceived barriers were the most significant factors to meet an adequate level of PA. The risk of insufficient PA was twofold greater in men with primary or lesser studies and who are employed. In women, living in rural environments increased the risk of insufficient PA. The promotion of organized PA may be an efficient way to increase the level of PA in the general population. Improvement in the access to sport facilities and places for PA is a prerequisite that may be insufficient and should be combined with strategies to improve self-efficacy and overcome perceived barriers in adulthood.

Niveles de actividad física medido con acelerómetro en alumnos de 3º ciclo de Educació Primaria: actividad física diaria y sesiones de Educación Física / Children's physical activity levels measured by ecceletometer: all day physical activity vs physical education classes

La inactividad física durante los primeros años de vida está reconocida actualmente como un importante factor coadyuvante en el incremento de los niveles de obesidad y de otros trastornos médicos graves que se observan en niños y niñas de Europa y de otros lugares. Los niños pasan una gran parte de su tiempo en el entorno escolar y con el modelo curricular existente, podría convertirse en un entorno propicio para promocionar la actividad física. La meta de este estudio fue medir de forma objetiva la actividad física de la población infantil e identificar cuánta actividad física saludable se realizaba dentro y fuera de las clases de Educación Física escolar en el periodo de tiempo de una semana. La muestra estaba compuesta por 36 niños de 11 a 12 años de una escuela de la provincia de Toledo en España. El instrumento utilizado fue el acelerómetro. La mayoría de los niños y niñas no cumplían las recomendaciones de actividad física saludable. En relación a la cantidad de actividad física saludable realizada durante la semana las clases de Educación Física presentaron un peso importante (AU)

Physical inactivity during the early years of life is currently indicated as a major contributor to increased levels of obesity and other serious medical conditions and is being seen in children and adolescents all across europe. children spend a large part of their time at school. the new school curriculum provides good opportunities to promote physical activity. The present study aims to measure children’s all day physical activity objectively and identify the amount of physical activity that takes place during physical education classes. the study comprised a sample of 32 spanish children ages 11-12 from a school in toledo, spain. an accelerometer was used to measure physical activity. most of the children did not achieve the physical activity health guidelines (i.e., a minimum of 60 minutes of moderate to vigorous physical activity (mvpa). physical education classes provided a considerable amount of mvpa and played an important role in relation to the total amount of mvpa that took place during the week (AU)

Associations between screen time and physical activity among Spanish adolescents.

BACKGROUND: Excessive time in front of a single or several screens could explain a displacement of physical activity. The present study aimed at determining whether screen-time is associated with a reduced level of moderate to vigorous physical activity (MVPA) in Spanish adolescents living in favorable environmental conditions. METHODOLOGY/PRINCIPAL FINDINGS: A multi-stage stratified random sampling method was used to select 3503 adolescents (12-18 years old) from the school population of Gran Canaria, Spain. MVPA, screen-time in front of television, computer, video game console and portable console was assessed in the classroom by fulfilling a standardized questionnaire. Bivariate and multivariate logistic regression analyses adjusted by a set of social-environmental variables were carried out. Forty-six percent of girls (95% CI±2.3%) and 26% of boys (95% CI±2.1%) did not meet the MVPA recommendations for adolescents. Major gender differences were observed in the time devoted to vigorous PA, video games and the total time spent on screen-based activities. Boys who reported 4 hours•week(-1) or more to total screen-time showed a 64% (OR = 0.61, 95% CI, 0.44-0.86) increased risk of failing to achieve the recommended adolescent MVPA level. Participation in organized physical activities and sports competitions were more strongly associated with MVPA than screen-related behaviors. CONCLUSIONS/SIGNIFICANCE: No single screen-related behavior explained the reduction of MVPA in adolescents. However, the total time accumulated through several screen-related behaviors was negatively associated with MVPA level in boys. This association could be due to lower availability of time for exercise as the time devoted to sedentary screen-time activities increases. Participation in organized physical activities seems to counteract the negative impact of excessive time in front of screens on physical activity.