Regular physical activity improves glycaemic control in pregnant women with gestational diabetes. Motivational interviewing is an effective technique for increasing activity levels. This report evaluates a clinical pathway developed to integrate physical activity motivational interviewing into routine gestational diabetes care. Women attending a single-centre NHS clinic were invited to engage in a physical activity-focused motivational interview. The aerobic physical activity levels of 62 women were evaluated at baseline and at a 2-week telephone follow up, coded into three categories by minutes of moderate intensity physical activity per week: red (