Abstract: A system and method for exercising core muscles, particularly the lumbar intrinsic musculature, including the multifidi. A system is disclosed that includes: a first sensor for detecting upper body exertions of a user engaged in an exercise; a second sensor for detecting lower torso exertions for the user engaged in the exercise; a third sensor for detecting lower extremity exertions for the user engaged in the exercise; a control system for processing sensor data from the first, second and third sensor, said control system including: a user interface system for communicating information with the user; a data collection system for collecting sensor data; an analysis system for analyzing the sensor data and determining if the user is performing the exercise in a technically correct manner; and a feedback system for alerting the user when the exercise is not being performed in the technically correct manner.