The sooner people can cross their legs after having a stroke, the better their chances for recovery, new research suggests. This complicated movement, occurring within two weeks of a stroke, is a good sign that the brain is processing again, researchers said. “It looks simple, but it’s very complex,” said Dr. Naveen Goyal, director of the Stroke Center at the Brooklyn Hospital Center in New York City. “It requires a good amount of strength because the leg is such a heavy part of the body.