Foley 2008.

Methods	RCT (parallel group)
Participants	Recruited from media advertisements, pamphlet and poster displays and psychiatric referrals with major depressive episode. Age range 18 ‐ 55, mean age and gender data not stated N = 23
Interventions	1. Moderate‐intensity aerobic exercise. Each session lasted 30 ‐ 40 minutes (n = 10) 2. Mild‐intensity stretching (n = 13) 12‐week programme of 3 supervised sessions per week
Outcomes	Beck Depression Inventory Montgomery‐Asberg Depression Rating scale
Notes	Intention‐to‐treat analysis Small sample size with insufficient power to detect small differences
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described
Allocation concealment (selection bias)	Unclear risk	Unclear
Blinding (performance bias and detection bias) participants	Unclear risk	Participants were not blind to treatment allocation, but it is unclear what effect this has had on bias.
Blinding (performance bias and detection bias) those delivering intervention	Unclear risk	Those delivering intervention were not blind, but it is unclear what effect this had on bias
Blinding (performance bias and detection bias) outcome assessors	High risk	Self report BDI
Incomplete outcome data (attrition bias) All outcomes	High risk	10/23 dropped out (2/10 in exercise arm and 8/13 in stretching)
Selective reporting (reporting bias)	Unclear risk	From the study report, it appears that all prespecified outcome measures have been reported; no protocol
Other bias	Unclear risk	Unclear