Effect of walking on circadian rhythms and sleep quality of patients with lung cancer: a randomised controlled trial

Background:Sleep disturbances and poor rest-activity rhythms, which can reduce the quality of life, are highly prevalent among patients with lung cancer.Methods:This trial investigated the effects of a 12-week exercise intervention including home-based walking exercise training and weekly exercise counseling on 111 lung cancer patients. Participants were randomly allocated to receive the intervention or usual-care. Outcomes included objective sleep (total sleep time, TST; sleep efficiency, SE; sleep onset latency, SOL; and wake after sleep onset, WASO), subjective sleep (Pittsburgh Sleep Quality Index, PSQI), and rest-activity rhythms (r24 and I<O). Outcomes were assessed at baseline and 3 and 6 months after intervention.Results:The PSQI (Wald χ2=15.16, P=0.001) and TST (Wald χ2=7.59, P=0.023) of the patients in the exercise group significantly improved 3 and 6 months after intervention. The moderating effect of I<O on TST was significant (β of group × I<O=3.70, P=0.032).Conclusions:The walking program is an effective intervention for improving the subjective and objective sleep quality of lung cancer patients and can be considered an optional component of lung cancer rehabilitation.

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