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Tina Smith, Sue Reeves, Lewis G. Halsey, Jörg Huber and Jin Luo

adaptation. Generally, pedometers have been regarded as less accurate than accelerometers in physical activity assessment 24 , 25 and are affected by increasing body mass index (BMI) and waist circumference, and greater pedometer tilt in overweight and obese adults leading to an underestimation of actual

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Gregory Knell, Deborah Salvo, Kerem Shuval, Casey Durand, Harold W. Kohl III and Kelley P. Gabriel

). However, recent technological advances now allow for mail-based delivery and collection of behavioral measures (e.g., accelerometry for physical activity assessment) in large epidemiological studies ( Lee & Shiroma, 2014 ). For example, beginning in the early 2000s, the Reasons for Geographic and Racial

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Diego Augusto Santos Silva, Katie E. Gunnell and Mark Stephen Tremblay

. Sedentary behaviour in youth . Br J Sports Med . 2011 ; 45 ( 11 ): 906 – 913 . PubMed doi:10.1136/bjsports-2011-090192 10.1136/bjsports-2011-090192 21836174 5. Sirard JR , Pate RR . Physical activity assessment in children and adolescents . Sports Med . 2001 ; 31 ( 6 ): 439 – 454 . PubMed doi:10

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Chelsea Steel, Carolina Bejarano and Jordan A. Carlson

typically collected at high frequencies, such as every minute or second, and merged between devices based on timestamps. Particularly in youth, short intervals of 5–15 seconds are recommended for physical activity assessment ( Rowlands, 2007 ). Data processing techniques and research questions often

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Jordan Andre Martenstyn, Lauren Powell, Natasha Nassar, Mark Hamer and Emmanuel Stamatakis

, lifestyle-embedded activity and sleep: new frontiers in physical activity assessment . Can J Public Health . 2007 ; 98 ( suppl 2 ): S208 – S217 . 18213950

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Scott J. Dankel, Jeremy P. Loenneke and Paul D. Loprinzi

spanning the International Classification of Disease 10th Revision coding (C00–C97). Covariates Analyses were adjusted for the following covariates: self-reported aerobic-based physical activity (dichotomous; meets guidelines vs does not; details on physical activity assessment described elsewhere 25

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Dimitrios Poulimeneas, Maria I. Maraki, Eleni Karfopoulou, Yannis Koutras, Stavrie Chrysostomou, Costas A. Anastasiou, Stavros A. Kavouras and Mary Yannakoulia

computed. Physical Activity Assessment The short version of the International Physical Activity Questionnaire (IPAQ) validated for the Greek population 15 was used to evaluate participants’ physical activity, that is, weekly sessions (lasting over 10 min) of vigorous, moderate activities and walking, and

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Mark S. Tremblay

. Incidental movement, lifestyle-embedded activity and sleep: new frontiers in physical activity assessment . Appl Physiol Nutr Metab . 2007 ; 32 ( suppl 2E ): S208 – S217 . doi:10.1139/H07-130 10.1139/H07-130 21. Esliger DW , Tremblay MS . Physical activity and inactivity profiling: the next

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Esra Uzelpasaci, Türkan Akbayrak, Serap Özgül, Ceren Orhan, Emine Baran, Gülbala Nakip, Sinan Beksac and Semra Topuz

KR , Chasan-Taber L , Symons Downs D , Pearce EE . Review of self-reported physical activity assessments for pregnancy: summary of the evidence for validity and reliability . Paediatr Perinat Epidemiol . 2012 ; 26 ( 5 ): 479 – 494 . PubMed ID: 22882792 doi:10.1111/j.1365-3016.2012.01311.x

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Erika Rees-Punia, Alicia Holloway, David Knauft and Michael D. Schmidt

, Van Praagh E , Berthoin S . Improving physical activity assessment in prepubertal children with high-frequency accelerometry monitoring: a methodological issue . Prev Med. 2007 ; 44 ( 2 ): 143 – 147 . PubMed doi:10.1016/j.ypmed.2006.10.004 10.1016/j.ypmed.2006.10.004 17157370 29. Myers BM