Physical activity levels have also dramatically
decreased in the past several decades. It has been
estimated that less than half of US adults engaged in
recommended levels of physical activity in 2005 [5].
Levels of physical activity have also decreased in adolescents
[6]. There is less access to physical activity (fewer
sidewalks), less physical education in schools [7], and
more time is spent on sedentary behaviors such as television
watching, surfing the internet, and playing video
games [8]. The myriad advances in technology developed
over the past few decades have made many tasks more
efficient, but in the process have ultimately decreased the
number of calories expended (i.e., TV remote controls,
automatic garage door opener, etc.).
Physical activity levels have also dramaticallydecreased in the past several decades. It has beenestimated that less than half of US adults engaged inrecommended levels of physical activity in 2005 [5].Levels of physical activity have also decreased in adolescents[6]. There is less access to physical activity (fewersidewalks), less physical education in schools [7], andmore time is spent on sedentary behaviors such as televisionwatching, surfing the internet, and playing videogames [8]. The myriad advances in technology developedover the past few decades have made many tasks moreefficient, but in the process have ultimately decreased thenumber of calories expended (i.e., TV remote controls,automatic garage door opener, etc.).
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