Abstract
Background：Fatigue, a factor that may reduce physical activity, varies between dialysis and nondialysis
days. Therefore, fatigue needs to be investigated separately on dialysis and non-dialysis days.
Purpose：The aim of this study was to investigate the relationship between fatigue and physical
activity, divided into dialysis and non-dialysis days.
Method: This cross-sectional study included 30 hemodialysis outpatients. Physical activity was
measured step counts on non-dialysis days. Step counts was recorded by activity tracker from the
time of waking up to bedtime on non-dialysis day. Fatigue was measured using the Japanese version of
the Chalder Fatigue Scale. Fatigue on dialysis days was assessed within 1 hour after a dialysis session
and fatigue on non-dialysis days was assessed after waking up. Step counts and fatigue were measured
four times on consecutive dialysis and non-dialysis days, and the mean value of each was calculated.
Statistical analysis was conducted by linear regression analysis.
Result：Greater fatigue on dialysis days was significantly associated with lower step counts on nondialysis
day（ B：−206.28, 95％ CI：−359.17, −53.40）.
Conclusion：The findings suggest that it is necessary to focus on fatigue on dialysis days to increase
physical activity on non-dialysis days.
