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Changes in Weight, Sedentary Behaviour and Physical Activity during the School Year and Summer Vacation

Author

Listed:
  • Chiaki Tanaka

    (Division of Integrated Sciences, J. F. Oberlin University, Tokyo 194-0294, Japan)

  • John J. Reilly

    (Physical Activity for Health Group, School of Psychological Sciences & Health, University of Strathclyde, Glasgow G1 1QE, UK)

  • Maki Tanaka

    (Department of Child Education, Kyoto Seibo College, Kyoto 612-0878, Japan)

  • Shigeho Tanaka

    (Department of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo 162-8636, Japan)

Abstract

Background : To examine bidirectional associations between body weight and objectively assessed sedentary behaviour (SB) and physical activity (PA) during the school year and summer vacation. Methods : Participants were 209 Japanese boys and girls (9.0 ± 1.8 years at baseline). SB and PA were measured using triaxial accelerometry that discriminated between ambulatory and non-ambulatory PA, screen time measured by questionnaire during the school-term was evaluated in May and the summer vacation, and relative body weight measured in May and just after the end of summer vacation. Results : There were no significant relationships between changes in SB or PA and changes in body weight. However, higher relative body weight at baseline was associated with decreased non-ambulatory moderate PA ( p = 0.049), but this association was slightly diminished after adjusting for change in SB ( p = 0.056). Longer screen time at baseline was also associated with increased relative body weight ( p = 0.033). Conclusions : The present study revealed that body weight might be particularly influential on non-ambulatory moderate PA while SB, PA or changes in these variables did not predict changes in body weight. Moreover, screen time during the school year is a predictor of change in relative body weight during the subsequent summer vacation.

Suggested Citation

  • Chiaki Tanaka & John J. Reilly & Maki Tanaka & Shigeho Tanaka, 2018. "Changes in Weight, Sedentary Behaviour and Physical Activity during the School Year and Summer Vacation," IJERPH, MDPI, vol. 15(5), pages 1-19, May.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:5:p:915-:d:144621
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    References listed on IDEAS

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    1. Yuki Hikihara & Chiaki Tanaka & Yoshitake Oshima & Kazunori Ohkawara & Kazuko Ishikawa-Takata & Shigeho Tanaka, 2014. "Prediction Models Discriminating between Nonlocomotive and Locomotive Activities in Children Using a Triaxial Accelerometer with a Gravity-removal Physical Activity Classification Algorithm," PLOS ONE, Public Library of Science, vol. 9(4), pages 1-11, April.
    2. Kristin E. Heron & Joshua M. Smyth & Esther Akano & Stephen A. Wonderlich, 2013. "Assessing Body Image in Young Children," SAGE Open, , vol. 3(1), pages 21582440134, February.
    3. Timothy A. Brusseau & Ryan D. Burns, 2018. "Children’s Weight Gain and Cardiovascular Fitness Loss over the Summer," IJERPH, MDPI, vol. 15(12), pages 1-8, December.
    4. Kobayashi, Masako & Kobayashi, Maiko, 2006. "The relationship between obesity and seasonal variation in body weight among elementary school children in Tokyo," Economics & Human Biology, Elsevier, vol. 4(2), pages 253-261, June.
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    Cited by:

    1. Chiaki Tanaka & Yuki Hikihara & Takafumi Ando & Yoshitake Oshima & Chiyoko Usui & Yuji Ohgi & Koichi Kaneda & Shigeho Tanaka, 2019. "Prediction of Physical Activity Intensity with Accelerometry in Young Children," IJERPH, MDPI, vol. 16(6), pages 1-11, March.

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