Rheumatoid arthritis (RA), a chronic, inflammatory condition with increased mortality from cardiovascular disease, is associated with high health care related costs and decreased productivity. Currently, non-pharmacological management guidelines recommend increasing low levels of physical activity in this group to improve health including cardiovascular health, yet research has shown that people who have RA have reduced levels of PA. Interventions targeting PA behaviour in this population have had limited effect to date due to lack of patient involvement in designing the intervention, poor measurement of PA, lack of behaviour change theory underpinning the intervention and have tended to include people who already have some level of PA. Work to underpin a robust intervention to improve PA in this group has been undertaken by members of this study group including validation of an objective measure PA in RA and interviews with people who have RA and rheumatology health professionals to aid in designing an intervention to promote PA. Thus, the aim of this pilot randomised controlled trial (RCT) is to examine the feasibility of a physiotherapist led, behaviour change theory informed, PA intervention to promote PA in people who have RA who have low levels of current PA. This pilot study will determine the rate of recruitment to the study and also determine the acceptability of the intervention to the participants as well as test the feasibility of the secondary disease/PA focused outcome measures. Participants will be recruited from rheumatology clinics in a large teaching hospital. Participants meeting inclusion criteria will be randomised into a six week PA intervention (four sessions delivered over a six week period by a trained physiotherapist) or a control group (PA information leaflet). This pilot randomised study will provide valuable information for the scaling up of a primary care based intervention for this important patient group and in doing so provide an achievable, pragmatic intervention for busy clinicians, who need feasible interventions to appropriately manage complex chronic conditions like RA in a busy primary care setting.