A new study suggests that staying physically strong could also help delay dementia. This means improving physical health could be important regardless of genetic risk. While it does not prove that reducing frailty will prevent dementia, it strongly suggests that maintaining physical fitness may become an important part of dementia prevention. Future clinical studies will be needed to determine whether programs that reduce frailty can also delay the onset of cognitive decline. If you care about brain health, please read studies about inflammation that may actually slow down cognitive decline in older people, and low vitamin D may speed up cognitive decline.