National Health SurveyConsistent with previous cycles of the National Health Survey (NHS), the types of exercise covered were walking for fitness, recreation and sport, walking for transport, moderate exercise and vigorous exercise. In 2017-18, data was additionally collected for the first time on workplace activity. 'Workplace activity' consists of two domains; moderate and vigorous activity, which was undertaken on a typical work day. Moderate exercise consists of activity that causes a moderate increase in heart rate or breathing, while vigorous exercise causes a large increase in a person's heart rate or breathing.