Christine M. Friedenreich

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The mechanisms by which aerobic fitness confers beneficial effects on cognition with aging are unclear but may involve cerebrovascular adaptations. In a cross-sectional study of women from the community (n=42; age range=50-90 years), we sought to determine whether physical fitness is associated with higher cerebrovascular function, and its relationship to(More)
BACKGROUND Exercise is beneficial for breast cancer patients during chemotherapy but adherence to different types and doses of exercise is a challenge. The purpose of this study was to examine predictors of adherence to different types and doses of exercise during breast cancer chemotherapy in a multicenter randomized controlled trial. METHODS Breast(More)
OBJECTIVE We examined the effects of an aerobic exercise intervention on adiposity outcomes that may be involved in the association between physical activity and breast cancer risk. DESIGN This study was a two-centre, two-armed, randomized controlled trial. The 1-year-long exercise intervention included 45  min of moderate-to-vigorous aerobic exercise(More)
PURPOSE To study whether physical inactive women with a tendency to develop metabolic syndrome have high levels of 17beta-estradiol (E2) of importance for breast cancer risk. METHODS Two hundred and four healthy women of reproductive age were assessed for self-reported leisure-time physical activity (LPA), resting heart rate (HR), blood pressure (BP),(More)
OBJECTIVES Supervised exercise is beneficial for lymphoma patients, but it needs to be maintained to optimize long-term benefits. Here, we report the predictors of follow-up exercise behavior 6 months after a randomized controlled trial in lymphoma patients. METHODS Lymphoma patients were randomly assigned to 12 weeks of supervised aerobic exercise (n =(More)
BACKGROUND Aging and physical inactivity are associated with declines in some cognitive domains and cerebrovascular function, as well as an elevated risk of cerebrovascular disease and other morbidities. With the increase in the number of sedentary older Canadians, promoting healthy brain aging is becoming an increasingly important population health issue.(More)
Physical exercise has been shown to enhance quality of life (QOL) in cancer survivors using pretest-posttest designs and compared to usual care (i.e. no intervention). In the present study, we conducted a randomized controlled trial to determine if exercise could improve QOL in cancer survivors beyond the known benefits of group psychotherapy (GP). We(More)
The authors determined the validity and reliability of their Past Year Total Physical Activity Questionnaire (PYTPAQ), which assesses the frequency, duration, and intensity of occupational, household, and recreational activities performed over the past year. The PYTPAQ was completed twice at baseline, 9 weeks apart (on average), by 154 healthy Canadian men(More)
BACKGROUND A primary aim of the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort study is to examine the association between total physical activity levels (comprising occupational, household and recreational activity) and the incidence of cancer. We examined the validity and long-term repeatability of total physical activity(More)
Preliminary evidence indicates that physical exercise may be an effective strategy for helping cancer patients cope with the negative side-effects of their treatment. The purpose of the present study was to examine the utility of the theory of planned behavior in understanding cancer patients' motivation to exercise during treatment. A total of 164 women(More)