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Associations of accelerometer-measured sedentary time, sedentary bouts, and physical activity with adiposity and fitness in children.
J Sports Sci 2020; 38(1):114-120JS

Abstract

Sedentary time (ST) has been inconsistently associated with adiposity and cardiorespiratory fitness in children in previous studies. We studied cross-sectional associations of ST, light physical activity (LPA), and moderate-to-vigorous physical activity (MVPA) with fat mass index (FMI) and cardiorespiratory fitness (estimated VO2max). Associations were evaluated with and without considering pattern of ST by bout length. We measured ST and activity by a wrist-worn accelerometer, FMI by bioelectrical impedance, and VO2max by Pacer test in 443 children (51.2% girls, 10.2 ± 0.6 years). Isotemporal substitution regression models estimated the effects of substituting ST, LPA, and MVPA on FMI and VO2max. Further models repeated analyses separating ST into short (<10 min) and long (≥10 min) bouts. Only replacing ST or LPA with MVPA was consistently associated with lower FMI and greater VO2max. When separated by bout length, only one unique association was found where replacing long ST bouts with short ST bouts was associated with lower FMI in girls only. In conclusion, activity pattern is associated with adiposity in girls and fitness in boys and girls. Separating ST into long and short ST bouts may be of minimal importance when assessing associations with adiposity and fitness using wrist-worn accelerometry in children.

Authors+Show Affiliations

Department of Health and Physical Activity, University of Pittsburgh, Pittsburgh, PA, USA.Department of Human Nutrition, University of Otago, Dunedin, New Zealand.Department of Exercise and Sports Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.Department of Human Nutrition, University of Otago, Dunedin, New Zealand.Department of Human Nutrition, University of Otago, Dunedin, New Zealand. Policy and Programmes Department, International Diabetes Federation (IDF), Brussels, Belgium.Department of Human Nutrition, University of Otago, Dunedin, New Zealand.Department of Health and Physical Activity, University of Pittsburgh, Pittsburgh, PA, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31665975

Citation

Jones, Melissa A., et al. "Associations of Accelerometer-measured Sedentary Time, Sedentary Bouts, and Physical Activity With Adiposity and Fitness in Children." Journal of Sports Sciences, vol. 38, no. 1, 2020, pp. 114-120.
Jones MA, Skidmore PM, Stoner L, et al. Associations of accelerometer-measured sedentary time, sedentary bouts, and physical activity with adiposity and fitness in children. J Sports Sci. 2020;38(1):114-120.
Jones, M. A., Skidmore, P. M., Stoner, L., Harrex, H., Saeedi, P., Black, K., & Barone Gibbs, B. (2020). Associations of accelerometer-measured sedentary time, sedentary bouts, and physical activity with adiposity and fitness in children. Journal of Sports Sciences, 38(1), pp. 114-120. doi:10.1080/02640414.2019.1685842.
Jones MA, et al. Associations of Accelerometer-measured Sedentary Time, Sedentary Bouts, and Physical Activity With Adiposity and Fitness in Children. J Sports Sci. 2020;38(1):114-120. PubMed PMID: 31665975.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Associations of accelerometer-measured sedentary time, sedentary bouts, and physical activity with adiposity and fitness in children. AU - Jones,Melissa A, AU - Skidmore,Paula Ml, AU - Stoner,Lee, AU - Harrex,Harriet, AU - Saeedi,Pouya, AU - Black,Katherine, AU - Barone Gibbs,Bethany, Y1 - 2019/10/30/ PY - 2019/11/2/pubmed PY - 2020/1/11/medline PY - 2019/11/1/entrez KW - Isotemporal substitution KW - VO2max KW - activity profile KW - fat mass index KW - wrist accelerometry SP - 114 EP - 120 JF - Journal of sports sciences JO - J Sports Sci VL - 38 IS - 1 N2 - Sedentary time (ST) has been inconsistently associated with adiposity and cardiorespiratory fitness in children in previous studies. We studied cross-sectional associations of ST, light physical activity (LPA), and moderate-to-vigorous physical activity (MVPA) with fat mass index (FMI) and cardiorespiratory fitness (estimated VO2max). Associations were evaluated with and without considering pattern of ST by bout length. We measured ST and activity by a wrist-worn accelerometer, FMI by bioelectrical impedance, and VO2max by Pacer test in 443 children (51.2% girls, 10.2 ± 0.6 years). Isotemporal substitution regression models estimated the effects of substituting ST, LPA, and MVPA on FMI and VO2max. Further models repeated analyses separating ST into short (<10 min) and long (≥10 min) bouts. Only replacing ST or LPA with MVPA was consistently associated with lower FMI and greater VO2max. When separated by bout length, only one unique association was found where replacing long ST bouts with short ST bouts was associated with lower FMI in girls only. In conclusion, activity pattern is associated with adiposity in girls and fitness in boys and girls. Separating ST into long and short ST bouts may be of minimal importance when assessing associations with adiposity and fitness using wrist-worn accelerometry in children. SN - 1466-447X UR - https://www.unboundmedicine.com/medline/citation/31665975/Associations_of_accelerometer-measured_sedentary_time,_sedentary_bouts,_and_physical_activity_with_adiposity_and_fitness_in_children L2 - http://www.tandfonline.com/doi/full/10.1080/02640414.2019.1685842 DB - PRIME DP - Unbound Medicine ER -