A sensor-based system that measures at least one parameter relating to an individual and provides feedback to the individual when any of the measured parameters exceed a threshold value for that parameter. In some instances, the system can be used to monitor an individual recovering from a condition, for example, mild Traumatic Brain Injury. The system can include a wearable sensor that measures parameters, which may relate to the individuals movement, physiological function, and/or environment. The system can include a controller that receives the parameter measurements and determines whether such measurements are acceptable by comparison to a threshold value. The system can also include a feedback device that alerts the individual when a measured parameter is unacceptable, for example, with a visual, audible, and/or haptic cue, as well as the capability to receive input from the user when an otherwise acceptable parameter level is causing discomfort.
