1. Do you need to stand or sit for long periods of time every day?
2. Do you feel low back pain or fatigue after working in the same posture for a long time?
3. Do you feel your waist is stiff when you get up in the morning?
4. Is it difficult or painful to change postures, such as sitting to sitting, sitting to sitting?
5. Does the low back pain extend to the lower limbs?