RadioMD News... I'm John Byrd.

One more reason to watch your waistline: it can ward off Alzheimer's. New research has found that keeping trim can not only delay when you might get it, but influence whether you get it at all. About 5 million people in the U.S. are living with Alzheimer's, with that number expected to double by 2050.

Those who have had hip or knee replacement are at a higher risk of having a heart attack in the month following the procedure, found a new study. The possibility of blood clots in that time period was 8 times greater than normal. Researchers noted that the findings don't mean you shouldn't have these types of surgeries.

And... taking a midday nap can be beneficial to your health. Not only does it lower your blood pressure and reduces the risk for cardiovascular events, it can also decrease the medication required for hypertension, say scientists. The only problem is convincing your boss that taking an hour out of a busy day to take a siesta is going to make you healthier and more likely to get even more work done for the company.

For RadioMD News, this is John Byrd. Hear health talk interviews with top experts at RadioMD dot com.