Editing Obesity (section)

===Sedentary lifestyle===
{{See also|Sedentary lifestyle|Exercise trends}}
A sedentary lifestyle may play a significant role in obesity.<ref name = "Seidell_2005" />{{rp|10}} Worldwide there has been a large shift towards less physically demanding work,<ref name=WHO2009>{{cite web|url=https://www.who.int/dietphysicalactivity/publications/facts/obesity/en/ |title=Obesity and overweight |website=World Health Organization |access-date=10 January 2009 |archive-url=https://web.archive.org/web/20081218104805/http://www.who.int/dietphysicalactivity/publications/facts/obesity/en/ |archive-date=18 December 2008}}</ref><ref name=WHOExercise>{{cite web |url=https://www.who.int/dietphysicalactivity/factsheet_inactivity/en/index.html |title=WHO &#124; Physical Inactivity: A Global Public Health Problem |website=World Health Organization|access-date=22 February 2009 |archive-date=13 February 2014 |archive-url=https://web.archive.org/web/20140213190030/http://www.who.int/dietphysicalactivity/factsheet_inactivity/en/index.html |url-status=dead }}</ref><ref name=Ness2006>{{cite journal | vauthors = Ness-Abramof R, Apovian CM | title = Diet modification for treatment and prevention of obesity | journal = Endocrine | volume = 29 | issue = 1 | pages = 5–9 | date = February 2006 | pmid = 16622287 | doi = 10.1385/ENDO:29:1:135 | s2cid = 31964889 | type = Review }}</ref> and currently at least 30% of the world's population gets insufficient exercise.<ref name=WHOExercise/> This is primarily due to increasing use of mechanized transportation and a greater prevalence of labor-saving technology in the home.<ref name=WHO2009/><ref name=WHOExercise/><ref name=Ness2006/> In children, there appear to be declines in levels of physical activity (with particularly strong declines in the amount of walking and physical education), likely due to safety concerns, changes in social interaction (such as fewer relationships with neighborhood children), and inadequate urban design (such as too few public spaces for safe physical activity).<ref name="Pediatric Fitness">{{Cite book | vauthors = Salmon J, Timperio A | volume = 50 | pages = 183–99 | year = 2007 | pmid = 17387258 | doi = 10.1159/000101391 | isbn = 978-3-318-01396-2 | series = Medicine and Sport Science | type = Review | title = Pediatric Fitness | chapter = Prevalence, Trends and Environmental Influences on Child and Youth Physical Activity }}</ref> World trends in active leisure time [[physical activity]] are less clear. The World Health Organization indicates people worldwide are taking up less active recreational pursuits, while research from Finland<ref>{{cite journal | vauthors = Borodulin K, Laatikainen T, Juolevi A, Jousilahti P | title = Thirty-year trends of physical activity in relation to age, calendar time and birth cohort in Finnish adults | journal = European Journal of Public Health | volume = 18 | issue = 3 | pages = 339–44 | date = June 2008 | pmid = 17875578 | doi = 10.1093/eurpub/ckm092 | type = Research Support | doi-access = free }}</ref> found an increase and research from the United States found leisure-time physical activity has not changed significantly.<ref>{{cite journal | vauthors = Brownson RC, Boehmer TK, Luke DA | title = Declining rates of physical activity in the United States: what are the contributors? | journal = Annual Review of Public Health | volume = 26 | pages = 421–43 | year = 2005 | pmid = 15760296 | doi = 10.1146/annurev.publhealth.26.021304.144437 |doi-access=free| type = Review }}</ref> Physical activity in children may not be a significant contributor.<ref name=Wil2011>{{cite journal | vauthors = Wilks DC, Sharp SJ, Ekelund U, Thompson SG, Mander AP, Turner RM, Jebb SA, Lindroos AK | title = Objectively measured physical activity and fat mass in children: a bias-adjusted meta-analysis of prospective studies | journal = PLOS ONE | volume = 6 | issue = 2 | pages = e17205 | date = February 2011 | pmid = 21383837 | pmc = 3044163 | doi = 10.1371/journal.pone.0017205 | bibcode = 2011PLoSO...617205W | doi-access = free }}</ref>

In both children and adults, there is an association between television viewing time and the risk of obesity.<ref>{{cite journal | vauthors = Gortmaker SL, Must A, Sobol AM, Peterson K, Colditz GA, Dietz WH | title = Television viewing as a cause of increasing obesity among children in the United States, 1986–1990 | journal = Archives of Pediatrics & Adolescent Medicine | volume = 150 | issue = 4 | pages = 356–62 | date = April 1996 | pmid = 8634729 | doi = 10.1001/archpedi.1996.02170290022003 | type = Review }}</ref><ref>{{cite journal | vauthors = Vioque J, Torres A, Quiles J | title = Time spent watching television, sleep duration and obesity in adults living in Valencia, Spain | journal = International Journal of Obesity and Related Metabolic Disorders | volume = 24 | issue = 12 | pages = 1683–8 | date = December 2000 | pmid = 11126224 | doi = 10.1038/sj.ijo.0801434 | s2cid = 26129544 | type = Research Support | doi-access =  }}</ref><ref>{{cite journal | vauthors = Tucker LA, Bagwell M | title = Television viewing and obesity in adult females | journal = American Journal of Public Health | volume = 81 | issue = 7 | pages = 908–11 | date = July 1991 | pmid = 2053671 | pmc = 1405200 | doi = 10.2105/AJPH.81.7.908 }}</ref> Increased media exposure increases the rate of childhood obesity, with rates increasing proportionally to time spent watching television.<ref>{{cite web|url=http://ipsdweb.ipsd.org/uploads/IPPC/CSM%20Media%20Health%20Report.pdf |title=Media + Child and Adolescent Health: A Systematic Review |publisher=Common Sense Media |year=2008 | vauthors = Emanuel EJ |access-date=6 April 2009}}</ref>