Physical Inactivity can be caused by various factors:	increased consumption of television, computer, internet, videogames low family income atmosphere created by community setting environmental factors
Diet	increased fat and sugar intake increased portion size increased fast food intake
Genetics, Perinatal, & Early Life Factors	mutations in gene coding prenatal overnutrition may increase life long risk of obesity undernutrion at important stages of fetal development may induce permanent physiological changes that result in obesity bottle Feeding. Children who were bottle fed seem to be more at risk of obesity later in childhood than those who were breast fed
Family Factors	parent-child interactions and the home environment can affect behaviors related to risk of obesity social support from parents and others correlates strongly with participation in physical activity low family income
Marketing & Advertising	food industry links food with entertainment. e.g., commercials featuring food, food at movie theatres brand names of food and drinks appears on toys

References:
Browniee, S., Martens, E., McDowell, J., Sieger, M. (2002). Too heavy, too young. Time Canada, 159(3), 60. Retrieved October 28, 2002 from: Canadian MAS FullTEXT Elite.

Ebbeling, C.B., Pawlak, D.B., & Ludwig, D.S. (2002). Childhood obesity: public-health crisis, common sense cure. Lancet 360(9331), 473. Retrieved November 9, 2002 from CINAHL Database with Full Text.

McLellan, Faith. (2002). Marketing and advertising: harmful to children's health. Lancet, 360(9338), 1001. Retrieved November 5, 2002 from: Canadian MAS FullTEXT Elite.