A system and method for using biometric data received from a user to generate feedback messages for transmission to the user while the user performs a physical activity. Wireless biometric sensors such as those used to monitor heart rate, blood pressure, and pulse rate are integrated into a user's diet and exercise plan and the personalized instruction that the individual receives. An expert system uses the biometric data to monitor the effectiveness of the physical activity and generate feedback messages. The expert system then sends the messages to the user's mobile device. The messages may inform the user of the biometric data, may provide positive reinforcement related to the user's progress toward a stated goal, or may suggest modifications to the physical activity to assist the user in reaching a stated goal.