Advice to Obama on battling presidential aging

By Madison Park
CNN
(CNN) — When a new president strolls into the White House, there’s a kick in his step and a twinkle in his eyes.
more photos » But as the years go by, the high-stakes decisions, constant criticisms and the fluctuating public opinion chip away at the president. His shoulders slump a little and his energy may seem sapped.

The president ages twice as fast while in office, according to a theory advanced by Dr. Michael Roizen, a chief wellness officer at the Cleveland Clinic.