BACKGROUND: Cycling to and from school is an important source of physical activity (PA) in youth but it is not captured by the dominant objective method to quantify PA. The aim of this study was to quantify the underestimation of objectively assessed PA caused by cycling when using accelerometry. METHODS:Participants were 20 children aged 11 to 14 years from a randomized controlled trial performed in 2011. Physical activity was assessed by accelerometry with the addition of heart rate monitoring during cycling to school. Global positioning system (GPS) was used to identify periods of cycling to school. RESULTS:Mean minutes of moderate-to-vigorous physical activity (MVPA) during round-trip commutes was 10.8 (95% CI: 7.1-16.6). Each kilometer of cycling meant an underestimation of 9314 (95% CI: 7719-11238) counts and 2.7 (95% CI: 2.1-3.5) minutes of MVPA. Adjusting for cycling to school increased estimates of MVPA/day by 6.0 (95% CI: 3.8-9.6) minutes. CONCLUSIONS: Cycling to and from school contribute substantially to levels of MVPA and to mean counts/min in children. This was not collected by accelerometers. Using distance to school in conjunction with self-reported cycling to school may be a simple tool to improve the methodology.
RCT Entities:
BACKGROUND: Cycling to and from school is an important source of physical activity (PA) in youth but it is not captured by the dominant objective method to quantify PA. The aim of this study was to quantify the underestimation of objectively assessed PA caused by cycling when using accelerometry. METHODS:Participants were 20 children aged 11 to 14 years from a randomized controlled trial performed in 2011. Physical activity was assessed by accelerometry with the addition of heart rate monitoring during cycling to school. Global positioning system (GPS) was used to identify periods of cycling to school. RESULTS: Mean minutes of moderate-to-vigorous physical activity (MVPA) during round-trip commutes was 10.8 (95% CI: 7.1-16.6). Each kilometer of cycling meant an underestimation of 9314 (95% CI: 7719-11238) counts and 2.7 (95% CI: 2.1-3.5) minutes of MVPA. Adjusting for cycling to school increased estimates of MVPA/day by 6.0 (95% CI: 3.8-9.6) minutes. CONCLUSIONS: Cycling to and from school contribute substantially to levels of MVPA and to mean counts/min in children. This was not collected by accelerometers. Using distance to school in conjunction with self-reported cycling to school may be a simple tool to improve the methodology.
Authors: Sidsel L Domazet; Jakob Tarp; Tao Huang; Anne Kær Gejl; Lars Bo Andersen; Karsten Froberg; Anna Bugge Journal: PLoS One Date: 2016-01-04 Impact factor: 3.240
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Authors: Jostein Steene-Johannessen; Bjørge Herman Hansen; Knut Eirik Dalene; Elin Kolle; Kate Northstone; Niels Christian Møller; Anders Grøntved; Niels Wedderkopp; Susi Kriemler; Angie S Page; Jardena J Puder; John J Reilly; Luis B Sardinha; Esther M F van Sluijs; Lars Bo Andersen; Hidde van der Ploeg; Wolfgang Ahrens; Claudia Flexeder; Marie Standl; Holger Shculz; Luis A Moreno; Stefaan De Henauw; Nathalie Michels; Greet Cardon; Francisco B Ortega; Jonatan Ruiz; Susana Aznar; Mikael Fogelholm; Andrew Decelis; Line Grønholt Olesen; Mads Fiil Hjorth; Rute Santos; Susana Vale; Lars Breum Christiansen; Russ Jago; Laura Basterfield; Christopher G Owen; Claire M Nightingale; Gabriele Eiben; Angela Polito; Fabio Lauria; Jeremy Vanhelst; Charalambos Hadjigeorgiou; Kenn Konstabel; Dénes Molnár; Ole Sprengeler; Yannis Manios; Jaanus Harro; Anthony Kafatos; Sigmund Alfred Anderssen; Ulf Ekelund Journal: Int J Behav Nutr Phys Act Date: 2020-03-18 Impact factor: 6.457