Introduction: Previously, we have shown the feasibility and acceptability of a digital behavioural modification (DBM) intervention in lung transplant (LTx) recipients (Hume et al, 2022; Chr Resp Dis).

Aim: To explore the short- and longer-term effects of a DBM intervention on physical activity and HRQoL compared to usual care (UC) in LTx recipients.

Methods: 17 Patients (COPD n=6; ILD n=8; CF n=2; PH n=1) were randomised to 3 months of DBM (n=10) or UC (n=7). DBM comprised of a motivational interview, pedometer and a smartphone app, that provided individualised activity goals, feedback, education, and initiated contact with the researcher as required for 3 months. Physical activity outcomes using accelerometery (Actigraph wGT3X) and HRQoL were assessed at baseline, 3 and 6 months.

Results: Both DBM and UC groups showed clinically important (600-1100 steps/day) increases in steps/day and physical SF-36 scores at 3 months, with a clinically greater improvement shown in the DBM group for steps/day (by 1838 steps/day). Improvements in steps/day were maintained for DBM at 6 months; but UC showed a clinically important decline (Figure 1).

Conclusion: There was evidence of recovery in physical activity following LTx, however this was optimised and maintained when a DBM intervention was implemented, due to the incorporation of strategies to modify physical activity behaviour.