Testosterone, the most important of the male sex hormones, has been both touted and blamed for the critical role it plays in making men men. It has been praised for building muscle, fueling a healthy libido and maintaining energy levels. It has also been faulted for making some men overly aggressive. But the level of testosterone peaks in a man's body in his 20s and gradually declines with age. Can it get too low and what happens if it does? Should he consider testosterone replacement therapy (TRT)? To find out more about this testosterone deficiency and its treatment, we spoke with Dr. Lisa Tenover, a geriatrician at Emory University who studies the effects of hormone replacement in men age 65 and older.

When he retired to the beach after an illustrious biomedical research career, Jack McConnell, M.D. — integral to such advances as the tuberculosis test, Tylenol, and magnetic resonance imaging — tried to be "what they call a typical retiree: play golf, eat at restaurants and travel." Easy to do in Hilton Head, S.C., a community of 30,000 that boasts more than 30 golf courses and at least twice as many restaurants.

If you're not already a subscriber to Living Longer and Loving It! and would like to subscribe, Click Here.

To read previous Living Longer and Loving It newsletters, Click Here.