Background and purpose. To identify methods used to measure free living sedentary behaviour in people with back pain and review the validity and reliability of identified measures. Methods. Databases including CINAHL, EMBASE, MEDLINE, AMED, PsycINFO, SPORTDiscus and the Sedentary Behaviour and Research Network website (. www.sedentarybehaviour.org. ) were searched for relevant published articles up to June 2014. Studies which measured sedentary behaviour in people with back pain were included. Quality of the included studies was assessed using the Newcastle Ottawa Scale. The Consensus-based Standards for the Selection of Measurement Instruments (COSMIN) Checklist was used to assess psychometric properties. Results. Six papers were identified; two of high methodological quality. The most common method of data collection was self-report, using activity diaries or questionnaires. Sedentary behaviour measured by accelerometry ranged from 6.7 to 10.7 hours per day whereas results from self-report measures ranged from 5 to 9.4 hours per day. According to the COSMIN checklist, the psychometric properties of the measurement instruments were rated fair to excellent. Conclusion. People with back pain spend a large proportion of their waking day participating in sedentary behaviour. Therefore valid and reliable sedentary behaviour measurements, such as those identified in this study, are essential for assessing the effectiveness of public health interventions and for future population monitoring. Conflicts of interest: No conflicts of interest. Sources of funding: Department for Employment and Learning