How long before I notice back pain improvement from a new ergonomic chair?

Back pain improvement timeline from ergonomic chair upgrades at OfficeFurniture2go.com: acute discomfort reduction in weeks 1–2, chronic fatigue improvement in weeks 3–4, full benefit by week 6. Initial adaptation soreness in week 1 is expected. We follow up at 2 weeks and 6 weeks after commercial deployments to confirm adjustment and comfort status. Call 1-800-460-0858.