That's the question of the hour. The Ebola virus has made taking your temperature part of everyday conversation. People in West Africa are doing it. People returning from the region are doing it. And so are the overly paranoid in the United States.
For anyone who's been exposed to the virus, a body temperatures of 100.4 or higher has been deemed the point of concern. The goal, of course, is that magic number: 98.6 degrees Fahrenheit.
Except 98.6 degrees isn't so magical after all. In fact, that might not be your normal temperature.
Walking is a simple thing that becomes really, really important as we age. Being able to get around on our feet for extended periods of time not only makes everyday life easier, it's linked to fewer hospitalizations and greater longevity. As we get older, though, the body takes about 15 to 20 percent more energy to cover the same terrain.