In this month's sport and exercise medicine section Makdissi and Davis examine the effectiveness of using video analysis for concussion surveillance in Australian football. They suggest that video analysis has a part to play in the side-line assessment of concussion in support of an appropriate clinical assessment. However, they acknowledge that the need for multiple camera angles with good quality video limits this approach to high level games. Thorning and colleagues in an exploratory study of the effect of knee bracing in menisectomised patients suggest that worthwhile changes in knee joint moments warrant further research on these devices. Leong's group outline shoulder strength differences associated with reduced subacromial space.