[The Kiel efficiency test--a method for the objectivation of the trunk musculature in adults]

Trunk muscle insufficiency plays a central role in the etiology and pathogenesis of low-back pain. Intensity, duration and recurrence of the complaints depend very much on whether rehabilitative measures succeed in achieving lasting strengthening of the trunk muscles by a specific exercise programme. So far we had to rely on subjective criteria to identify insufficiencies of the trunk muscles. Now the Kiel Efficiency Test gives us a measure to objectify and describe this disorder. The test is simple and reproducible, can be performed in any consultation room and has proved to be reliable.