Physical Activity Through Health Technology in Axial Spondyloarthritis

Inclusion Criteria: * Diagnosis of axial spondyloarthritis by a rheumatologist * English speaking * Insufficiently active (less than 150 minutes of moderate intensity aerobic activity per week) * Willing to wear a Fitbit for the study duration * Willing to have or create a Google account and download the Google Health app (previously known as the Fitbit app) Exclusion Criteria: * Currently pregnant * International travel or any circumstance causing lack of access to wi-fi/Internet at any point during the study period * Recent or planned surgery that may affect ability to engage in physical activity * Unable to exercise for health reasons, or a provider has recommended against exercising for safety/health reasons * Unable to walk safely without difficulty, or is a fall risk (i.e., 3+ falls in past 6 months) * History of a fall resulting in a fracture or head injury in the past 6 months * Cardiovascular contraindicators for physical activity, or history of cardiovascular problems that may be exacerbated by physical activity, as defined by their rheumatologist * Diabetes causing hypoglycemia following physical activity