Figure 6. Measurement of lumbar spine ROM using the TiltMeter^© -advanced level and inclinometer app.

A) Starting position with the iPhone^® was placed on the T₁₂–L₁ spinal level. (B) Maximum flexion was measured at the T₁₂–L₁ spinal level. (C) Maximum extension was measured at the T₁₂–L₁ spinal level. (D) Starting position with the iPhone^® was placed on the S₁–S₂ spinal level. (E) Maximum flexion was measured at the S₁–S₂ spinal level. (F) Maximum extension was measured at the S₁–S₂ spinal level.