ETTR if possible, and don't be afraid to bump up the ISO.
Under similar conditions I shoot with at least 1/320th, but recently I think I've been getting better results shooting at 1/640 or 1/800. Typically my ISOs will be between 3200 and 12800, but I do tend to use longer focal lengths (70-300) and my lens only goes up to f4-5.6 (yes I know I need faster glass). I also turn off all in camera processing to get the best of the burst rate. I tend to shoot in manual, AI Servo mode, shutter release - metering and af start (bbf can be awkward for long shots IME), spot metering, single AF point on manual select.
I find it quite difficult to get the subject in focus at less than f4 on the 50mm anyway.