You would have to ask your physician to explain what that means for you specifically. Some experts describe functional disability as difficulty with daily activities. For some patients this could include dressing, walking, or climbing stairs.
Others may describe a functional disability as the inability to sit or stand for long periods of time. This type of limitation can make some jobs difficult or impossible. Difficulty lifting, carrying heavy objects, or participating in an exercise or sports program can also be labelled a functional disability.
There are some standard tests that can be used to measure and quantify disability. Two of the more commonly used tools are the Disability Rating Index (DRI) and Oswestry Disability Index (ODI). Pain levels and measure of difficulty with a variety of tasks are measured.
These tools also take into consideration activities such as sleeping, sex, social life, and traveling. You may remember filling out some forms with questions about these activities. Ask your doctor to go over his or her test results with you to explain your type and degree of disability.