The following Dutch researchers Anke Oenema , Johannes Brug, Arie Dijkstra, Inge de Weerdt and Hein de Vries just published a randomized controlled trial targeting saturated fat intake, physical activity, and smoking cessation. They concluded that the Internet-delivered, computer-tailored lifestyle intervention was effective in reducing self-reported saturated fat intake and in increasing self-reported PA among participants who completed the study.
Please find the study here.