Researchers say people who walk at the age of 45 may age faster. Slow walkers in their and fifties could get older more than faster walkers. This could make people and mentally older. Walking could help doctors understand more about the health older people have. Doctors already know that older people who walk slowly are more to have health problems. They wanted to find out if was the for younger people. A researcher said: "Doctors know that slow walkers in their 70s and 80s tend to die sooner than fast walkers their age."
The researchers looked at the of 904 people. The people had records of health from throughout their . Some records went back to when the people were years old. The researchers looked at how quickly people could calculate and how good their was as as their intelligence. Researchers did tests on the participants at walking speeds. The participants had to say the alphabet while walking at a and fast speed. The people who walked more slowly showed less brain in brain scans while saying the alphabet.