Disability; Episodes; Exacerbations; Flare-up; Flares; Low back pain; Recurrence.

The Flares of Low back pain with Activity Research Study (FLAReS): study protocol for a case-crossover study nested within a cohort study

This study protocol describes the FLAReS project, which aims to clarify the complex relationship between physical activity and low back pain flares. The researchers intend to distinguish between transient, short-term ef…