Do subjects with with chronic low back pain have different movement patterns compared to healthy controls. Yes.

Can movement pattern control be assessed reliably. Yes (a systematic review suggested a higher quality study showed good reliability)

Does biomechanics suggest there are a change in forces e.g., shear (and hence tissue loading) when trunk flexion is performed with a reduced lumbar spine lordosis. This generally occurs when trunk flexion occurs with less hip flexion. Yes.

Is this the answer for all chronic low back pain. No. This is what sub-classification is for. A fundamental aspect of clinical reasoning is to match the patient’s symptoms to the potential source of nociception to the tissue loading mechanism.