Strength
Holding on to muscle is one of the strongest signals of how well we age.
Arnold Schwarzenegger said“Eat enough protein and keep lifting, and you hold on to your muscle as you age.”
The science saysStrongly supported. Protein plus resistance training is one of the best-proven ways to protect aging muscle.
Verdict: Real, and worth copying.
Jane Fonda said“Stay strong and keep moving as you get older, or you end up dependent on everyone else.”
The science saysWell supported. Large population studies tie lifelong activity to a longer, more independent life.
Verdict: Forty years on, the data still agrees with Jane.
Chris Hemsworth said“I carry a high-risk Alzheimer's gene, so I lean on exercise, sleep, and stress control to fight back.”
The science saysSupported. Big studies link regular exercise to meaningfully lower dementia risk, though they cannot promise it for any one person.
Verdict: He can't out-run his genes, but he can make them sweat.