Dr. Peter Attia, one of the leading voices in longevity medicine, looks closely at muscle strength, particularly grip strength, as a powerful indicator of health and cognitive resilience. “If you look at the correlation between grip strength and dementia risk or mortality, it’s staggering,” he says. “Grip strength is a proxy for overall strength, and that kind of strength is acquired, not inherited. The work you do to build it is what protects your brain.” | 60 Minutes