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Effect of maintaining supervised gym- and home-based exercises on the seasonal variations of metabolic outcomes in overweight and obese Japanese adults
  1. Hiroto Honda1,
  2. Makoto Igaki2,
  3. Motoaki Komatsu3,
  4. Shin-ichiro Tanaka3
  1. 1 Department of Physical Therapy, Faculty of Health Science, Aino University, Ibaraki, Japan
  2. 2 Department of Rehabilitation, Toyooka Hospital Hidaka Medical Center, Toyooka, Japan
  3. 3 Department of Internal Medicine, Toyooka Hospital Hidaka Medical Center, Toyooka, Japan
  1. Correspondence to Hiroto Honda; h-honda{at}pt-u.aino.ac.jp

Abstract

Objectives This study aimed to examine whether maintaining supervised gym- and home-based exercises for an extended time of period could decrease seasonal variations of metabolic outcomes in overweight and obese Japanese adults.

Methods This retrospective study recruited 54 overweight and obese outpatients who started exercising in 2006–2010 and analysed their metabolic outcomes for 5 years from March 2011 to February 2016. In this group, 26 participants performed moderate-intensity aerobic exercise (MIAE) for 30–40 min/day for at least 2 days/week, supervised by physical therapists at a hospital gym (GYM) during the observation period. Conversely, 28 participants were asked to perform MIAE by themselves at or around their homes (HOME) for the same duration.

Results The body mass index (BMI), waist circumference and homoeostasis model assessment of insulin resistance (HOMA-IR) values in winter were higher than those in other seasons in the HOME group but not in the GYM group. The annual ranges of BMI, waist circumference, fasting plasma glucose and HOMA-IR in the GYM group were smaller than those in the HOME group.

Conclusion Maintaining supervised gym-based exercise, as opposed to home-based exercise, may decrease seasonal variations of some metabolic outcomes in overweight and obese Japanese adults.

  • Exercise
  • Metabolism
  • Obesity
http://creativecommons.org/licenses/by-nc/4.0/

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

https://doi.org/10.1136/bmjsem-2020-000866

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    Footnotes

    • Contributors HH contributed to the study conception and design, acquisition of data, analysis and interpretation of data, and drafting and revising the manuscript. MI contributed to the study conception and design, acquisition of data, and analysis and interpretation of data. MK and ST contributed to acquisition of data, analysis and interpretation of data, and revising the manuscript. All authors approved the final version of the manuscript.

    • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

    • Competing interests None declared.

    • Patient consent for publication Not required.

    • Ethics approval This study was approved by the institutional review board of Toyooka Hospital Hidaka Medical Centre (approval number: 12).

    • Provenance and peer review Not commissioned; externally peer reviewed.

    • Data availability statement All data relevant to the study are included in the article.

    • Patient and public involvement Patients or the public were not involved in the design, conduct, reporting or dissemination plans of our research.