A significant negative association was found between aerobic exercise intensity and fatigue reduction .
A peak effect was found for moderate-intensity aerobic exercise for improving walking endurance .
No dose-response relationship was found between exercise and markers of inflammation or exercise duration and outcomes .
Rates of adherence were typically high and few adverse events were reported .
Exercise is safe , reduces fatigue and increases endurance in cancer survivors .
QUESTION Is there a dose-response effect of exercise on inflammation , fatigue and activity in cancer survivors ?
Effect of exercise on biomarkers, fatigue, sleep disturbances, and depressive symptoms in older women with breast cancer receiving hormonal therapy.
PURPOSE / OBJECTIVES To compare the effectiveness of a prescribed home-based walking exercise intervention with usual care in older women receiving hormonal treatment for breast cancer , and to examine relationships among levels of the cortisol , serotonin , interleukin-6 , and bilirubin biomarkers and fatigue , sleep disturbances , and depressive symptoms . DESIGN Longitudinal r and omized clinical trial . SETTING A National Cancer Institute- design ated cancer center in the southeastern United States . SAMPLE 20 women ( aged 55 years or older ) with breast cancer receiving hormonal treatment . METHODS Participants were r and omized to a walking exercise intervention or usual care . Laboratory sample s and the Pittsburgh Sleep Quality Index ( PSQI ) , the Piper Revised Fatigue Scale , and the Center for Epidemiological Studies -Depression Scale were collected at the initial clinic visit and at 12 weeks from the groups . Question naires also were collected at weeks 2 and 14 . MAIN RESEARCH VARIABLES Fatigue , sleep disturbances , depressive symptoms , biomarkers , and exercise . FINDINGS Effect of the exercise intervention on sleep scores was highly significant between groups . Exercise group scores on the PSQI decreased significantly over time ( indicating improved sleep quality ) , although scores did not change significantly within the control group . Sleep actigraphy also showed significantly shorter actual wake time and less movement in the exercise group . Serotonin levels also were significantly affected by the intervention . CONCLUSIONS Data suggest that a walking exercise intervention improves sleep in older women receiving hormonal treatment for their breast cancer . Serotonin levels may be a useful biomarker when assessing sleep disturbances in this group . IMPLICATION S FOR NURSING Clinicians need to be aware that older women receiving hormonal treatment for their breast cancer may experience fatigue , sleep disturbances , and depressive symptoms . Homebased walking activity may reduce symptom severity in this group
A significant negative association was found between aerobic exercise intensity and fatigue reduction .
A peak effect was found for moderate-intensity aerobic exercise for improving walking endurance .
No dose-response relationship was found between exercise and markers of inflammation or exercise duration and outcomes .
Rates of adherence were typically high and few adverse events were reported .
Exercise is safe , reduces fatigue and increases endurance in cancer survivors .
QUESTION Is there a dose-response effect of exercise on inflammation , fatigue and activity in cancer survivors ?