According to growing scienti;c evidence, walking can deliver an array
of bene;ts that are just as impressive as those gained from more di;cult
regimens. You might call walking America’s least trendy growing trend.
As reported by the Centers for Disease Control and Prevention, between
2005 and 2010, the number of adults who walked for 10 minutes or more
at least once a week increased by almost 20 million people.
Over the years, doctors, insurance companies, and public-health
o;cials have made their message loud and clear: Paul T. Williams, Ph.D.,
a sta; scientist at the Lawrence Berkeley National Laboratory in Berke-When we go for a walk, the heart pumps faster, circulating more blood
and oxygen, not just to the muscles but to all the organs, including the
brain. Many experiments have shown that, even a;er very mild exertion,
people perform better on tests of memory and attention. Walking on a
regular basis also promotes new connections between brain cells, staves
o; the usual withering of brain tissue that comes with age, and increases
the volume of the hippocampus, a brain region crucial for memory.