From backyard gardening to mountain climbing, outdoor activities are on the wane as people around the world spend more leisure time online or in front of the tube, according to findings. “The replacement of vigorous outdoor activities by sedentary, indoor videophilia has far-reaching consequences for physical and mental health, especially in children,” one of the researchers said. “Videophilia has been shown to be a cause of obesity, lack of socialization, attention disorders and poor academic performance.”