Multiple Australian outlets report that many popular “brain-training” approaches have limited or inconsistent evidence of improving long-term cognitive outcomes. They point to a 20-year study that instead highlights the concept of “cognitive reserve,” which refers to how well the brain can cope with age-related changes or pathology. The articles explain that higher cognitive reserve is associated with a reduced likelihood of developing dementia or delaying its onset, even when underlying brain changes are present. While the reports do not treat cognitive reserve as a single product or app, they frame it as something built over time through a range of mentally demanding activities and experiences. The outlets also emphasize that not all brain-training “hacks” have demonstrated durable benefits, and that the strongest takeaway from the study is the potential value of focusing on factors linked to cognitive reserve rather than relying on specific training programs. Overall, they present cognitive reserve as a more evidence-based pathway for thinking about dementia risk than most widely promoted brain-training strategies.