RESUMO
METHODS: Attitudes to increasing physical activity to reduce risk of dementia were assessed in a national online survey promoted via online forums and public adverts. The Motivation to Change Behaviour for Dementia Risk Reduction (MOCHAD-10) scale examined motivation for lifestyle change. Multivariable logistic regression was used to identify the predictors of willingness and motivation to increase physical activity. RESULTS: Data from 3,948 individuals showed most people were moderately/very physically active (80%). People more likely to be physically active had better health and education, were older, male, and had a partner. People willing to increase physical activity (73%) were more likely to be younger, non-White, underweight, had better health and lifestyles, and had experience caring for someone with dementia. People with higher levels of motivation to change lifestyle (MOCHAD-10 subscales) were more likely to be female, younger, in poorer physical/mental health, had lower perceived mental activity, and were a carer for someone with dementia. CONCLUSION: Men and those with better health status were more physically active. Those who exercised less and those who were more motivated to increase physical activity were not necessarily able to be physically active. Multisectoral public health strategies should seek to use the high motivation levels among this group to mitigate the barriers related to physical activity for dementia risk reduction.