Can going back in time in one's mind and reliving a younger time in our life actually change our body (making it younger too).

A doctor helps a group of elderly men go back 20 years in time and relive what it was like. The men were immersed in their past experience for five days. Before the experiment the doctor measures a variety of health markers, and then does it again five days later.

Researchers and doctors were amazed at the results. You'll learn why in this episode of "The Self Rejuvenating Body".