The intervention significantly improved global symptom severity (d=0.77, p=0.007), depression (d=0.68, p=0.02), anxiety (d=0.87, p=0.002), sleep quality (d=0.88, p=0.001), and increased exercise (d=0.82, p<0.0001), compared to the control group. Post-treatment differences between groups were significant for depression (d=0.63, p=0.03), sleep quality (d=0.61, p=0.03) and exercise (d=1.45, p<0.0001). Across both groups, the reduction of global symptom severity was significantly predicted by an increase of exercise (ß=0.35, p=0.01).
The exercise intervention showed therapeutic efficacy across psychiatric disorders and led to sustained exercise behaviour change. Exercise may be a feasible and efficacious transdiagnostic treatment approach within outpatient mental health care settings.
Data from the pilot study are expected to be published in 2021.