It has been hailed as a revolutionary way to get people moving, using smartphones to pursue cartoon creatures through city parks and streets on foot, instead of taking the car or metro. In the first week of playing the game, people took 955 additional steps per day on average — equalling nearly half the World Health Organization's recommended physical activity level, researchers found. "The results suggest that the positive health impact of Pokemon Go is moderate and diminishes after six weeks of playing," said a statement from the Harvard TH Chan School of Public Health, whose researchers conducted the study.