Background: Regular physical activity (PA) improves glycaemic control in women diagnosed with Gestational Diabetes (GDM). However, PA advice competes with other components of care, with many women forgoing the benefits of regular PA. Motivational interviewing (MI) is an effective technique for increasing individual PA levels. A clinical pathway was developed integrating MI on PA into the routine care. This report evaluates the impact of MIs on self-reported PA levels.Methods: Women attending a single centre NHS GDM clinic were invited to engage in an individual PA-focused MI session, delivered by a trained midwife. This included goal setting and activity planning. All women had a confirmed diagnosis of GDM based on a 75g oral glucose tolerance test using the International association of diabetes and pregnancy study group diagnostic thresholds. A modified version of the exercise vital sign was used to evaluate self-reported aerobic PA levels at baseline and two-week telephone follow-up. PA levels were coded into three categories: i) red (Results: Complete follow-up data was obtained from 62 women. Mean gestation was 27+5/40 weeks (9-36+4/40), mean age 31.7y (21-43y) and mean BMI 29.9kg/m2 (18.3-48.2 kg/m2). At baseline, 19 (30.6%) were coded red (Conclusion: This new clinical pathway provides encouraging results, showing that self-reported PA increased significantly at two-week follow-up. Further work is now required to examine the impact on glycaemic control, maternal and fetal outcomes, and maintenance of PA levels. This model of care should be integrated into other high-risk patient groups.