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Longitudinal changes in physical activity of early-stage breast cancer survivors in Japan during and after COVID-19 lockdown

Yulong, Ren ; Kojima, Yuta ; Tsuji, Katsunori ; Svensson, Thomas LU ; Suto, Akihiko and Ochi, Eisuke (2025) In The Journal of Physical Fitness and Sports Medicine 14(5). p.121-129
Abstract
This study investigated the changes in the physical activity of Japanese breast cancer survivors during and after the state of emergency declaration (SOED) due to the spread of COVID-19. Participants were survivors of stage I-IIa breast cancer diagnosed between the ages of 18 and 60 years who wore a wearable device (Fitbit Versa) before and after the SOED period. Outcomes included steps per day on weekdays and weekend days and holidays, sedentary time, and time spent engaged in various levels of physical activity. Seventeen participants were included in the analysis. Steps per day decreased significantly from 8450 ± 905 steps before the SOED to 6085 ± 526 steps during, and 6871 ± 776 steps after the SOED on weekdays (p < 0.05). No... (More)
This study investigated the changes in the physical activity of Japanese breast cancer survivors during and after the state of emergency declaration (SOED) due to the spread of COVID-19. Participants were survivors of stage I-IIa breast cancer diagnosed between the ages of 18 and 60 years who wore a wearable device (Fitbit Versa) before and after the SOED period. Outcomes included steps per day on weekdays and weekend days and holidays, sedentary time, and time spent engaged in various levels of physical activity. Seventeen participants were included in the analysis. Steps per day decreased significantly from 8450 ± 905 steps before the SOED to 6085 ± 526 steps during, and 6871 ± 776 steps after the SOED on weekdays (p < 0.05). No difference in sedentary time was observed before, during or after the SOED period on weekdays or weekend days, or holidays. Time spent engaged in light physical activity was significantly shorter on weekdays, decreasing from 251 ± 15 minutes before the SOED to 216 ± 15 minutes during, and 223 ± 16 minutes after the SOED (p < 0.05). Time spent engaged in moderate to vigorous physical activity was significantly shorter on weekdays before the SOED at 154 ± 39 minutes, dropping to 101 ± 29 minutes during, and increasing to 136 ± 38 minutes after the SOED (p < 0.05). It was concluded that participants spent less time engaged in all levels of physical activity on weekdays during the SOED. Therefore, during lockdowns, it is important to maintain higher intensities of physical activity on weekdays. Because steps and time spent engaged in light physical activity did not recover after the SOED period, breast cancer survivors need to focus on these parameters after lockdowns while also paying attention to infection prevention. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Fitness and Sports Medicine
volume
14
issue
5
pages
121 - 129
publisher
J-Stage
ISSN
2186-8123
DOI
10.7600/jpfsm.14.121
language
English
LU publication?
yes
id
bcd22df2-1fdf-4646-bbaf-d8c5a3c120f8
date added to LUP
2026-03-12 06:11:21
date last changed
2026-03-23 15:57:29
@article{bcd22df2-1fdf-4646-bbaf-d8c5a3c120f8,
  abstract     = {{This study investigated the changes in the physical activity of Japanese breast cancer survivors during and after the state of emergency declaration (SOED) due to the spread of COVID-19. Participants were survivors of stage I-IIa breast cancer diagnosed between the ages of 18 and 60 years who wore a wearable device (Fitbit Versa) before and after the SOED period. Outcomes included steps per day on weekdays and weekend days and holidays, sedentary time, and time spent engaged in various levels of physical activity. Seventeen participants were included in the analysis. Steps per day decreased significantly from 8450 ± 905 steps before the SOED to 6085 ± 526 steps during, and 6871 ± 776 steps after the SOED on weekdays (p &lt; 0.05). No difference in sedentary time was observed before, during or after the SOED period on weekdays or weekend days, or holidays. Time spent engaged in light physical activity was significantly shorter on weekdays, decreasing from 251 ± 15 minutes before the SOED to 216 ± 15 minutes during, and 223 ± 16 minutes after the SOED (p &lt; 0.05). Time spent engaged in moderate to vigorous physical activity was significantly shorter on weekdays before the SOED at 154 ± 39 minutes, dropping to 101 ± 29 minutes during, and increasing to 136 ± 38 minutes after the SOED (p &lt; 0.05). It was concluded that participants spent less time engaged in all levels of physical activity on weekdays during the SOED. Therefore, during lockdowns, it is important to maintain higher intensities of physical activity on weekdays. Because steps and time spent engaged in light physical activity did not recover after the SOED period, breast cancer survivors need to focus on these parameters after lockdowns while also paying attention to infection prevention.}},
  author       = {{Yulong, Ren and Kojima, Yuta and Tsuji, Katsunori and Svensson, Thomas and Suto, Akihiko and Ochi, Eisuke}},
  issn         = {{2186-8123}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{121--129}},
  publisher    = {{J-Stage}},
  series       = {{The Journal of Physical Fitness and Sports Medicine}},
  title        = {{Longitudinal changes in physical activity of early-stage breast cancer survivors in Japan during and after COVID-19 lockdown}},
  url          = {{http://dx.doi.org/10.7600/jpfsm.14.121}},
  doi          = {{10.7600/jpfsm.14.121}},
  volume       = {{14}},
  year         = {{2025}},
}