When a new president strolls into the White House, there's a kick in his step and a twinkle in his eyes.
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.
"The typical person who lives one year ages one year," he said. "The typical president ages two years for every year they are in office."
Using public information, Roizen looked through medical records of previous presidents back to Theodore Roosevelt. Assessing factors such as diet, blood pressure, physical activity and lifestyle habits, he calculated that the leader of the free world ages more quickly. Read full article »
CNN's Alina Cho and David S. Martin contributed to this report.