Chu 2008.

Methods	RCT
Participants	Volunteers aged 18 to 45 recruited via flyers and word of mouth from University and local physician referral. Depression severity mild to moderate, if severe required written permission from physician. Mean age 26.4 (18 to 43). 100% women.
Interventions	For 10 weeks: 1. Up to 5 high‐intensity aerobic exercise sessions per week (1 supervised) to expend 1000 Kcal per week (n = 15) 2. Up to 5 low‐intensity aerobic exercise sessions per week (1 supervised) to expend 1000 Kcal per week (n = 11) 3. Met with investigator once per week for 30 minutes of group stretching exercises (n = 12)
Outcomes	Beck Depression Inventory‐II
Notes	Analysis not intention‐to‐treat BDI‐II self‐rated depression score
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; not described
Blinding (performance bias and detection bias) participants	Unclear risk	Participants not blind to treatment allocation
Blinding (performance bias and detection bias) those delivering intervention	Unclear risk	Those delivering the intervention were not blind
Blinding (performance bias and detection bias) outcome assessors	High risk	BDI‐II self report was used as the primary outcome
Incomplete outcome data (attrition bias) All outcomes	High risk	16/54 dropped out (3/18 in high dose, 7/18 in low dose and 6/18 in control)
Selective reporting (reporting bias)	Unclear risk	It appears that all prespecified outcomes are reported, but no protocol
Other bias	Unclear risk	Unclear