Can Exercise Improve Cancer Associated Cognitive Dysfunction?
Objective 1:
Conduct a randomized trial to test the effectiveness of a 24-week aerobic exercise
intervention in adult, female breast cancer survivors with self-reported cognitive changes
following chemotherapy.
The investigators will test the following hypotheses:
1. A) The exercise intervention will improve performance on neuropsychological tests of
specific cognitive domains of executive function, namely i)selective attention and
response inhibition, ii)processing speed and mental flexibility, and iii) verbal memory
and learning in exercisers (EX; n=15) versus delayed exercise controls (CON; n=15).
B) The exercise intervention will reduce self-reported cognitive dysfunction and its
impact of function and quality of life, in EX compared to CON, measured as a decreased
score on the Functional Assessment Cancer Therapy-Cognition Scale (FACT-Cog).
Objective 2:
Conduct analyses on the effect of the intervention on brain activation patterns using
functional magnetic resonance imaging (fMRI).
The investigators will test the following hypotheses:
2. A) At baseline, brain activation patterns will differ in breast cancer survivors
reporting cognitive difficulties following chemotherapy compared to breast cancer
survivors who have not received chemotherapy (who serve as breast cancer/no
chemotherapy controls; not enrolled in the exercise intervention) during
neuropsychological tests completed in the scanner.
B) The exercise intervention will result in a decrease in regions of cortical activation,
particularly in regions that show higher activation in breast cancer survivors following
chemotherapy, compared with no change in controls.
Interventional
Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Treatment
Stroop Test
Tests response inhibition, measure number of correct vs incorrect responses
Change from baseline at 6 months
No
Kristin Campbell, PT, PhD
Principal Investigator
University of British Columbia
Canada: Health Canada
H10-02774
NCT01296893
January 2011
January 2014
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