PMID- 14551780 OWN - NLM STAT- MEDLINE DCOM- 20031119 LR - 20181113 IS - 1439-6319 (Print) IS - 1439-6319 (Linking) VI - 89 IP - 6 DP - 2003 Aug TI - Physical activity level measured by doubly labeled water and accelerometry in children. PG - 624-6 AB - The present study investigated the use of a tri-axial accelerometer, Tracmor2, for the measurement of physical activity in children. Eleven children [age 6.9 (2.2) years, body mass 19.5 (5.3) kg and height 112.3 (14.4) cm] were studied. Total daily energy expenditure (TDEE) was measured using the doubly labeled water method over a 2-week period. In addition, basal metabolic rate (BMR) was determined by the ventilated hood system. Physical activity level (PAL) was defined as TDEE/BMR. Tracmor2 was worn during the same 2-week period throughout waking hours after which average counts per day were calculated. The average counts per day were shown to be highly correlated to PAL values measured by doubly labeled water: PAL = 1.156 x 10(-5) x Tracmor2 average counts day(-1) + 0.978 (r=0.79, P<0.01). In conclusion, Tracmor2 is a valid instrument to measure physical activity in children under free-living conditions. FAU - Hoos, Marije B AU - Hoos MB AD - Department of Pediatrics, University of Maastricht, PO Box 5800, 6202 AZ Maastricht, The Netherlands. marije.hoos@kg.unimaas.nl FAU - Plasqui, G AU - Plasqui G FAU - Gerver, Willem-Jan M AU - Gerver WJ FAU - Westerterp, Klaas R AU - Westerterp KR LA - eng PT - Journal Article DEP - 20030709 PL - Germany TA - Eur J Appl Physiol JT - European journal of applied physiology JID - 100954790 RN - 0 (Oxygen Isotopes) SB - IM MH - Basal Metabolism/*physiology MH - Body Water/*physiology MH - Child MH - Child, Preschool MH - Female MH - Humans MH - Linear Models MH - Male MH - *Motor Activity MH - Oxygen Isotopes MH - Physical Fitness EDAT- 2003/10/11 05:00 MHDA- 2003/12/03 05:00 CRDT- 2003/10/11 05:00 PHST- 2003/04/30 00:00 [accepted] PHST- 2003/10/11 05:00 [pubmed] PHST- 2003/12/03 05:00 [medline] PHST- 2003/10/11 05:00 [entrez] AID - 10.1007/s00421-003-0891-6 [doi] PST - ppublish SO - Eur J Appl Physiol. 2003 Aug;89(6):624-6. doi: 10.1007/s00421-003-0891-6. Epub 2003 Jul 9.