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Original research
Physical activity and exercise behaviour of breast cancer survivors: nationwide cross-sectional survey
  1. Yoichi Shimizu1,
  2. Katsunori Tsuji2,
  3. Tomomi Narisawa3,
  4. Aya Kuchiba2,4,5,
  5. Taichi Shimazu2,
  6. Eisuke Ochi6,
  7. Naomi Sakurai7,
  8. Hiroji Iwata8,
  9. Hirokazu Arai9 and
  10. Yutaka Matsuoka2
  1. 1Department of Adult Nursing, National College of Nursing Japan, Kiyose, Tokyo, Japan
  2. 2National Cancer Center Institute for Cancer Control, Chuo-ku, Tokyo, Japan
  3. 3Musashino University, Koto-ku, Tokyo, Japan
  4. 4Teikyo University Graduate School of Public Health, Tokyo, Japan
  5. 5Biostatistics Division, Center for Research Administration and Support, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
  6. 6Hosei University Faculty of Bioscience and Applied Chemistry, Koganei, Tokyo, Japan
  7. 7Cancer Solutions Inc, Tokyo, Japan
  8. 8Department of Advanced Clinical Research and Development, Nagoya City University, Nagoya, Aichi, Japan
  9. 9Department of Psychology, Hosei University, Chiyoda-ku, Tokyo, Japan
  1. Correspondence to Professor Yutaka Matsuoka; matsuoka-psy{at}umin.ac.jp

Abstract

Objectives High physical activity levels have been associated with longer, healthier lifespans and improved quality of life among breast cancer survivors. The Japanese clinical guidelines for breast cancer survivors, similar to those in the USA, strongly recommend maintaining high physical activity levels. However, the extent of adherence to these guidelines among breast cancer survivors in Japan is unclear. This study aimed to assess adherence to guideline-recommended physical activities and identify associated factors.

Methods Self-administered questionnaires were distributed to breast cancer survivors without recurrence or metastasis from 34 facilities across Japan, with approximately 30 survivors per facility, between March 2019 and August 2020. The questionnaire collected information on participants’ backgrounds, physical activity levels (assessed using the Global Physical Activity Questionnaire) and potential factors influencing their physical activity. Logistic regression analysis was performed to identify the factors associated with meeting the guideline recommendations.

Results In total, 791 patients (77.5%) were investigated, with 50.5% meeting the physical activity recommendations outlined in the guidelines. Factors associated with meeting the guideline recommendations included higher self-efficacy (OR 1.58, 95% CI 1.29 to 1.94), greater perceived social support (OR 1.54, 95% CI 1.26 to 1.89), lower annual household income (OR 1.58, 95% CI 1.07 to 2.33), relief from cancer-related symptoms through physical activity (OR 1.81, 95% CI 1.13 to 2.94) and urban location (OR 1.50, 95% CI 1.03 to 2.20).

Conclusions Half of the breast cancer survivors in Japan did not meet the recommended physical activity levels, and several factors influencing adherence were identified.

  • Breast
  • Survivorship
  • Supportive care
  • Rehabilitation

Data availability statement

Data are available on reasonable request. The data supporting this study’s findings are available from the corresponding author on reasonable request.

https://doi.org/10.1136/spcare-2024-005253

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    Data availability statement

    Data are available on reasonable request. The data supporting this study’s findings are available from the corresponding author on reasonable request.

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    Footnotes

    • X @mtishizuchi, @Yutaka J. Matsuoka

    • Contributors YM is the guarantor. YM conceived and managed the entire research project. YS, KT, TN, EO, AK, NS, HI, HA and YM wrote the protocol for this study. YS, TN, AK and YM analysed and interpreted the data. YS drafted the manuscript. YS, KT, TN, EO, AK, NS, HI, HA, TS and YM critically revised the manuscript for important intellectual content. YM obtained funding. All authors read and approved the final manuscript.

    • Funding This study was funded by the National Cancer Center Research and Development Fund (30-A-17).

    • Disclaimer The funders play no role in the study design, data collection and analysis, decision to publish, or manuscript preparation.

    • Competing interests HI has received consulting fees from Daiichi Sankyo, Chugai, AstraZeneca, Lilly, MSD, Pfizer and Gilead and speaking or writing fees from Daiichi Sankyo, Chugai, AstraZeneca, Lilly, MSD, Pfizer, Taiho and Kyowa Kirin. All other authors declare that they have no competing interests regarding this work.

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

    • Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.