In the fourth century B.C., the Greek philosopher Aristotle laid down some key principles of running form. "Runners run faster if they swing their arms," he wrote. "There is in extending the arms a ...

Walking is one of the most effective and simple forms of physical activity. Though walking may look simple, the mechanics behind it are far more complex. While walking, people swing their arms. Ever ...

Running may seem like a total lower-body activity, but your upper half also plays a role in helping you become a strong and powerful runner. Keep reading for more details about how exactly your arms ...