NCT00458094.

Methods	Allocation: randomised Blindness: single Duration: 4 months Location: not stated
Participants	Diagnosis: people with serious mental illnesses n = 100 Age: 18–70 years Sex: both History: not stated Exclusion: any condition that would make weight loss medically inadvisable; diagnosis of or treatment for cancer (except non‐melanoma skin cancer) within 2 years prior to study entry; liver failure; history of anorexia nervosa; pregnant or planning to become pregnant during the study; inability to walk or participate in an exercise class; consumes > 14 alcoholic drinks per week; symptoms of angina or a cardiovascular event within 6 months prior to study entry.
Interventions	Group 1: physical activity intervention with peer support: 3 exercise sessions each week for 4 months and meeting with a peer educator once a week for 15 minutes Group 2: physical activity intervention without peer support: 3 weekly exercise sessions for 4 months
Outcomes	Primary outcome: cardiorespiratory fitness Secondary outcome: weight, waist circumference, physical activity, health status, centre for epidemiology depression scale, exercise‐related self‐efficacy, general perceived efficacy, participation
Notes	This study has been completed, however no data reported. We have contacted the authors to enquire whether there are any available data and are awaiting a response.