Bonnet 2005.

Methods	RCT
Participants	University counselling service Mean age 23.3 years 82% women N = 11
Interventions	1. CBT plus exercise (n = 5) 2. CBT alone (n = 6) Exercise was walking on a treadmill for 20 minutes, twice a week for 6 weeks Cognitive therapy: met counsellors once a week for 9 weeks
Outcomes	1. DSM‐IV MDD, dysthymia or depressive disorder 2. Above cut‐off depression on BDI and CES‐D
Notes	Self report Randomisation method not stated 7/11 randomised participants completed the interventions Data provided for each participant. Mean and SD calculated by us carrying forward baseline data for those who dropped out
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method of randomisation not described
Allocation concealment (selection bias)	Unclear risk	Method of randomisation not described
Blinding (performance bias and detection bias) participants	Unclear risk	Participants were not blind to treatment allocation, but it is unclear whether this introduced bias
Blinding (performance bias and detection bias) those delivering intervention	Unclear risk	Those delivering the intervention were not blinded; the effect of this on bias is unclear
Blinding (performance bias and detection bias) outcome assessors	High risk	The primary outcome was the BDI, which is a self report measure
Incomplete outcome data (attrition bias) All outcomes	High risk	4/11 dropped out (2/5 in the exercise and CBT; 2/6 in the CBT only group)
Selective reporting (reporting bias)	Unclear risk	On the basis of the report, all the prespecified outcomes have been reported. No protocol
Other bias	Unclear risk	Unclear