Method of manufacturing mouth guard having internal components for sensing impact forces

A method for monitoring the impact forces on a user that occur during a first activity or a second activity in which the user participates, comprising:

• while the user is engaged in the first activity, monitoring first activity impact data from a mouth guard worn by the user, the mouth guard including a flexible printed circuit board with linear and rotational force sensors and a memory device, the first activity impact data being provided by the linear and rotational force sensors;
• comparing the first activity impact data to first impact threshold data that is stored in the memory device in the mouth guard, the first impact threshold data being based associated with the first activity;
• in response to the first activity impact data exceeding the first impact threshold data, providing an indication to the user;
• while the user is engaged in the second activity, monitoring second activity impact data from the mouth guard worn by the user, the second activity impact data being provided by the linear and rotational force sensors;
• comparing the second activity impact data to second impact threshold data that is stored in the memory device in the mouth guard, the second impact threshold data being based associated with the second activity, the second impact threshold data being different from the first impact threshold data;
• and
• in response to the second activity impact data exceeding the second impact threshold data, providing an indication to the user.