The “man’s best friend” adage has been bolstered by new research showing walking a dog can make people feel more relaxed. “Interactions with dogs can decrease human stress and induce positive emotional responses,” according to South Korean scientists, who scanned brain activity in 30 adults while they walked, brushed and played with a poodle. Interacting with a dog has a “positive effect on both relaxation and concentration,” the Konkuk University team reported, in a paper published by the science journal PLOS One. But it’s best to bring a ball or find a stick to throw while out that walk, as …