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Effect of physical activity on cognitive function in older adults at risk for Alzheimer disease: A randomized trial

Context: Many observational studies have shown that physical activity reduces the risk of cognitive decline; however, evidence from randomized trials is lacking. Objective: To determine whether physical activity reduces the rate of cognitive decline among older adults at risk. Design and Setting: Randomized controlled trial of a 24-week physical activity intervention conducted between 2004 and […]

Effect of B vitamins and lowering homocysteine on cognitive impairment in patients with previous stroke or transient ischemic attack: a prespecified secondary analysis of a randomized, placebo-controlled trial and meta-analysis