Cell phone use is associated with alcohol and tobacco consumption in insufficiently active adolescents.

Background: The aim of this study was to estimate the prevalence of alcohol and tobacco experimentation by adolescents and to verify the association between cell phone use with alcohol and tobacco consumption in adolescents with different physical activity levels.

Methods: This work is a cross-sectional study with a representative sample of 772 adolescents (52.6% girls; age: 16.

[Physical activity and biological maturation: a systematic review].

Objective:: To analyze the association between physical activity (PA) and biological maturation in children and adolescents.

Data Source:: We performed a systematic review in April 2013 in the electronic databases of PubMed/MEDLINE, SportDiscus, Web of Science and LILACS without time restrictions. A total of 628 potentially relevant articles were identified and 10 met the inclusion criteria for this review: cross-sectional or longitudinal studies, published in Portuguese, English or Spanish, with schoolchildren aged 9-15 years old of both genders.

[Sociodemographic and behavioral factors associated with body adiposity in adolescents].

Objective:: To identify sociodemographic and behavioral factors associated with abdominal obesity (AO) and high body fat percentage (high BF%) in adolescents from the city of Curitiba-PR.

Methods:: The sample consisted of 1,732 adolescents, aged 11 to 19 years, of both genders. The triceps and calf skinfolds were measured for the calculation of BF%, as well as the waist circumference.

[High blood pressure in adolescents: prevalence and associated factors].

The aim of this study was to assess the prevalence and associated factors of high Blood Pressure (BP) among adolescents in a Brazilian city. A cross-sectional study was conducted with 653 adolescents (57.9% female) of high school level between 14 and 19 years of age.