Why the study?
Does physical inactivity increase the risk of all-cause dementia or Alzheimer's disease?
Does physical inactivity increase the risk of all-cause dementia or Alzheimer's disease?
Physical inactivity alone is not associated with dementia risk when addressing reverse causation, but may increase risk in those who develop cardiometabolic disease.
Does not support physical inactivity as an independent dementia risk factor; leaves open potential excess risk via cardiometabolic disease.
In analyses that addressed bias due to reverse causation, physical inactivity was not associated with all-cause dementia or Alzheimer's disease, although an indication of excess dementia risk was observed in a subgroup of physically inactive individuals who developed cardiometabolic disease.
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Kivimäki et al. (2019) studied this question.
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