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. 2009 May 10;18(7):1066–1073. doi: 10.1007/s00586-009-1020-y

Fig. 1.

Fig. 1

Knee lift abdominal test (KLAT). The subject is instructed to lift one foot off the table to 90° of hip flexion with knee flexion, keeping the lumbar spine stable. The pressure biofeedback is positioned under the lumbar spine. The pressure is read on the manometer