It's all in the shutter speed. These bowlers were shot at 1/160 of a second. It's just fast enough. I used my flash to fill in the lighting because most of the house lights were in front of the bowlers. A good flash will synchronize with the shutter up to a speed of 1/250 of a second. I also increased the sensitivity, the ISO, up to 2000. Increased sensitivity lets you increase shutter speed and still get a good exposure. High ISO usually adds noise to an image but my Canon 5Ds gets good images at high ISO and I reduced the noise in developing. I also increased the brightness in developing.