Health coaching intervention with or without the support of an exercise buddy to increase physical activity of people with chronic low back pain compared to usual care: a feasibility and pilot randomised controlled trial

Background: Exercise buddies (people to exercise together with) might support people with low back pain (LBP) to become active. However, involving buddies in randomised controlled trials (RCT) might challenge recruitment, data collection and follow-up. Objectives: To explore the feasibility of the intervention, recruitment and data collection approaches and potential effects of a health coaching intervention (focused on physical activity) with or without exercise buddies ' support on physical activity of people with chronic LBP versus usual discharge care. Design: Feasibility and pilot RCT. Methods: Adults (n = 30) discharged from LBP treatment were randomised to the Buddy -Assisted (health coaching intervention with exercise buddy 's support), Individual -Only (health coaching only), or usual care groups. Data were collected at baseline, three and six months. The feasibility of trial 's procedures was assessed through recruitment rate (acceptable if >70%), data completion rate (acceptable if <= 20% missing data), and follow-up rate (successful if >= 85%). The intervention 's acceptability was assessed via feedback questionnaires. Preliminary effects on physical activity and other outcomes were also explored. Results: Recruitment and baseline data completion were acceptable. However, data collection and follow-up rates post -randomisation were not. 85% of the Buddy -Assisted Group believed the buddies helped them to increase physical activity and would recommend the intervention. 70% of the Individual -Only and Control groups believed exercise buddies would help them to become further active. Conclusion: The data collection and follow-up approaches were not successful and need amending before a largescale RCT. Nonetheless, the buddy -assisted intervention was well -accepted. A future RCT will focus on differences in clinical outcomes. Trial registration: The study was registered at the Australian New Zealand Clinical Trial Registry (ACTRN12620001118998).