A total of 170 participants were randomized and 138 participants completed the 18-month assessment. Three hundred eleven individuals aged 50 years or older were screened for eligibility, 89 were not eligible, and 52 refused to participate. We recruited volunteers who reported memory problems but did not meet criteria for dementia.
Assessors of cognitive function were blinded to group membership. Randomized controlled trial of a 24-week physical activity intervention conducted between 20 in metropolitan Perth, Western Australia. To determine whether physical activity reduces the rate of cognitive decline among older adults at risk. Many observational studies have shown that physical activity reduces the risk of cognitive decline however, evidence from randomized trials is lacking.