Experimental design
trauma
Two trauma centers joined this two-arm, single-assessor blinded randomized controlled trial. All recruited patients were block randomized to the WB (n=60) or BFR (n=60) group by an independent research team member. The blinding procedure was performed using opaque envelopes (n=60 for each group). Each participant was asked by an independent research team member to choose one of the 120 envelopes. The groups were coded by an independent member of the research team, while the principal assessor of the results and data analysis was blinded to the group allocations.