Inclusion Criteria:  Veterans age 18-65 years seen in VA primary care for LBP Must have regular access (every day, during most hours of the day) to a computer, tablet, or smartphone with internet access at home or at work Basic computer literacy Having a mobile phone capable of receiving alerts using text messages Must be able to understand and read English, sufficient to provide informed consent and validly complete the study assessments. Participants must complete basic requirements during a 2-week run-in period, such as completing e-Questionnaires  Exclusion Criteria:  Red flag' spine conditions (spinal cord injury, infection, malignancy, fracture) or spondyloarthropathy Pregnancy Prisoners or incarcerated Severe active medical or psychiatric comorbidities likely to be a barrier to study participation including completing frequent, serial assessments (e.g., metastatic cancer). Thoracolumbar spine surgery in the past 1 year Other major orthopedic surgery potentially impeding normal physical activities (such as surgeries involving the hip, knee, ankle, shoulder, elbow, wrist joints) within the past 6 months, or major abdominal or chest surgery within the past 6 months.* Planned major orthopedic, abdominal, or chest surgery in the next 2 months.