System and method to determine user compliance with personalized diet and
exercise plans by analyzing responses to messages about the plans. An
expert system has a number of stored messages and display characteristics
from which it chooses. The expert system generates message relating to
the user's diet or physical activity that are sent to a user's mobile
device and analyzes responses. Display characteristics change
periodically and compliance data relating to the user's adherence to the
plan when certain display characteristics are used is stored (e.g., meal
plan adherence, acceptance of specific food selections, and adherence to
instructions and advice in messages). The expert system then determines
which messages and display characteristics achieve the greatest
compliance to the dietary and physical activity schedule and goals.