LAUSR

Background: Current methods used to measure the muscle strength required to achieve plantar flexion may yield highly variable results depending on the perception of the physician conducting the examination because these tests involve subjective and qualitative evaluation. Objective: To describe and evaluate the efficacy of a novel examination technique that can quantitatively measure plantar flexion in L5–S1 disc herniation. Materials and Methods: A total of 32 patients (average age: 49.4 years, range: 23–78) with L5–S1 disc herniations were included. The patient to be tested stood next to a table on which they could lean with their hands. The leg closer to the table was fully flexed at the knee, and the other foot was brought to maximum plantar flexion on the toes. At this point, a stopwatch was started to measure the time that passed until the muscles fatigued and the heel fell. The differences between the right and left plantar flexion times were noted. In addition, three different physicians graded muscle strength by using the classical “The Medical Research Council of the United Kingdom” method. Results: The time until fatigue in right and left plantar flexion was measured using the proposed method, and each test underwent a video recording. The Yilmaz–Ilbay plantar flexion test yielded the correct classification for all cases. Conclusion: We suggest that the proposed method “Yilmaz–Ilbay plantar flexion test” can serve as a useful, practical, and effective test to detect quantitative evaluation of plantar flexion in L5–S1 herniation.