Prevalence of childhood obesity and health problems resulting from a lack of physical activity are in a position to increase in most developed countries. Scientific evidence of the relationship between physical activity levels and health problems resulting from inactivity not fully studied. Levels of physical activity for young people and teenagers are insufficient. There is little evidence of positive results in relation to interventions with children. In general, interventions achieved significant changes in physical activity levels of approximately 13% in moderate and vigorous physical activity. Most interventions are not significant in children although teenagers. In the case of children is effectively a direct influence over the type of physical activities that are proposed, with a high recreational component and multicomponent interventions course include families and supporting institutional campaigns. For adolescent interventions must also be multicomponent and focus on environmental intervention center to have some assurance of effectiveness.
Strength training in adolescents is one of the pending subjects of Physical Education. Habitually, improvements in physical condition are solely and exclusively related to training in aerobic resistance. The objective of this study was to assess the effects of the incorporation of Crossfit along with aerobic games on aerobic capacity over a period of 8 weeks in a group of teens during their physical education sessions at the school. The study examined 82 subjects between 16-18 years of age, who were high school students. 40 women and 42 men were distributed into two groups, experimental and control. The results indicate that the effect on aerobic capacity measured through the course navette test is significantly positive through the inclusion of crossfit methodology along with aerobic games in physical education sessions.
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