New research finds those who think and dress youthful can actually become healthier.
Researchers at Harvard University reviewed a series of studies into how the mind influences the body.
In one experiment, elderly men lived as if it were 19 to 59 again, surrounded with '50s decor, music and TV shows.
By the end of a week, the men's hearing and eyesight improved, and their arthritic joints felt better.
Another study revealed that cutting and coloring women's hair not only made them feel younger, but reduced their blood pressure.
Researchers suggest not buying into the mindset of old age can help people feel and look younger.