Babul 2003.

Methods	Randomised (random‐numbers table), concealed allocation and patient and assessor blind. No report of intention‐to‐treat analysis or of exclusions.
Participants	16 healthy female volunteers. Underwent deliberately provocative exercise of non‐dominant quadriceps muscle.
Interventions	HBOT 100% oxygen at 2.0 ATA for 60 minutes at 4, 24, 48 and 72 hours post‐injury. CONTROL Sham HBOT at 1.2 ATA on air on the same schedule.
Outcomes	PAIN SCORE Visual analogue scale (0 to 10) STRENGTH Change from baseline expressed as maximum eccentric torque in Nm. SWELLING Tape measurement by blinded researcher at a standard point. expressed relative to pre‐injury value.
Notes	Schulz rating: Randomisation ‐ A Allocation concealment ‐ A Completeness of outcome data ‐ A Double‐blinding ‐ A Very small study with multiple outcomes. Complex experimental design with 2 distinct phases with somewhat different therapy arms.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate