title: How active are our children? Findings from the Millennium Cohort Study.
abstract: OBJECTIVE
  To describe levels of physical activity, sedentary time and adherence to Chief Medical Officers (CMO) physical activity guidelines among primary school-aged children across the UK using objective accelerometer-based measurements.
  
  
  METHODS
  Nationally representative prospective cohort study.
  
  
  METHODS
  Children born across the UK, between 2000 and 2002.
  
  
  METHODS
  6497 7-year-old to 8-year-old singleton children for whom reliable accelerometer data were available for at least 10 h a day for at least 2 days.
  
  
  METHODS
  Physical activity in counts per minute (cpm); time spent in sedentary and moderate-to-vigorous intensity physical activity (MVPA); proportion of children meeting CMO guidelines (≥60 min/day MVPA); average daily steps.
  
  
  METHODS
  Gender, ethnicity, maternal current/most recent occupation, lone parenthood status, number of children in the household and country/region of residence.
  
  
  RESULTS
  The median daily physical activity level was 595 cpm (IQR 507, 697). Children spent a median of 60 min (IQR 47-76) in MVPA/day and were sedentary for a median of 6.4 h/day (IQR 6-7). Only 51% met CMO guidelines, with girls (38%) less active than boys (63%). Children took an average of 10 229 (95% CI (8777 to 11 775)) steps each day. Children of Indian ethnicity were significantly less active overall than all other ethnic groups. Children of Bangladeshi origin and those living in Northern Ireland were least likely to meet CMO guidelines.
  
  
  CONCLUSIONS
  Only half of 7-year-old children in the UK achieve recommended levels of physical activity, with significant gender, ethnic and geographic variations. Longitudinal studies are needed to better understand the relevance of these (in)activity patterns for long-term health and well-being. In the meantime population-wide efforts to boost physical activity among young people are needed which are likely to require a broad range of policy interventions.
authors: MRC Centre of Epidemiology for Child Health, UCL Institute of Child Health, London, UK.
authors: Lucy J
authors: LJ
authors: Griffiths
authors: Mario
authors: M
authors: Cortina-Borja
authors: Francesco
authors: F
authors: Sera
authors: Theodora
authors: T
authors: Pouliou
authors: Marco
authors: M
authors: Geraci
authors: Carly
authors: C
authors: Rich
authors: Tim J
authors: TJ
authors: Cole
authors: Catherine
authors: C
authors: Law
authors: Heather
authors: H
authors: Joshi
authors: Andrew R
authors: AR
authors: Ness
authors: Susan A
authors: SA
authors: Jebb
authors: Carol
authors: C
authors: Dezateux
keywords: Paediatrics; Public Health; Sports Medicine
references: Diabetologia. 2010 Aug;53(8):1620-30
references: 20454952
references: Br J Sports Med. 2011 Sep;45(11):866-70
references: 21836171
references: BMJ Open. 2013 Mar 01;3(3):
references: 23457328
references: Int J Pediatr Obes. 2007;2(4):218-26
references: 17852552
references: Med Sci Sports Exerc. 1998 Apr;30(4):629-33
references: 9565947
references: PLoS Med. 2006 Dec;3(12):e488
references: 17194189
references: Int J Epidemiol. 2009 Aug;38(4):1082-93
references: 19377098
references: Int J Behav Nutr Phys Act. 2011 Jul 28;8:78
references: 21798014
references: Med Sci Sports Exerc. 2012 Jun;44(6):1081-7
references: 22143113
references: Am J Clin Nutr. 2009 Nov;90(5):1185-92
references: 19776141
references: J Sports Sci. 2008 Dec;26(14):1557-65
references: 18949660
references: PLoS One. 2013 Jun 24;8(6):e67206
references: 23826236
references: BMJ. 2012 Sep 27;345:e6320
references: 23044985
references: Br J Sports Med. 2005 Nov;39(11):792-8; discussion 792-8
references: 16244186
references: J Sports Sci. 2008 Nov;26(13):1411-9
references: 18942001
references: Am J Clin Nutr. 2004 May;79(5):851-6
references: 15113725
references: J Appl Physiol (1985). 2006 Apr;100(4):1324-31
references: 16322367
references: Stat Methods Med Res. 2016 Aug;25(4):1393-421
references: 23613490
references: Med Sci Sports Exerc. 2005 Nov;37(11 Suppl):S531-43
references: 16294116
references: Med Sci Sports Exerc. 2007 Sep;39(9):1501
references: 17805080
references: Br J Sports Med. 2011 Sep;45(11):859-65
references: 21836170
references: PLoS One. 2011;6(8):e21822
references: 21853021
references: Prev Med. 2010 Nov;51(5):345-51
references: 20682330
references: Arch Dis Child. 2007 Nov;92(11):963-9
references: 17855437
references: Med Sci Sports Exerc. 2002 Feb;34(2):350-5
references: 11828247
references: Prev Med. 2010 Aug;51(2):148-52
references: 20542493
references: Int J Behav Nutr Phys Act. 2012 Jun 07;9:68
references: 22676230
references: Pediatrics. 2011 Jan;127(1):e24-30
references: 21173005
references: Appl Physiol Nutr Metab. 2011 Feb;36(1):36-46; 47-58
references: 21326376
references: Obes Res. 2002 Mar;10(3):150-7
references: 11886937
references: Med Sci Sports Exerc. 2005 Feb;37(2):329-36
references: 15692331
references: J Bone Miner Res. 2007 Jan;22(1):101-9
references: 17014381
references: Am J Epidemiol. 2011 Jul 15;174(2):173-84
references: 21467152
references: Pediatr Res. 2007 Jun;61(6):646-52
references: 17426642