I have a Canon Rebel XSi and a Canon EF 70-300mm f/4-5.6 IS USM Telephoto Zoom Lens. I often take Arena Football pictures and I am struggling BIG TIME with getting non-motion blurred images. I have great timing but I can't seem to get sharp images 90% of the time. I've jacked the ISO up as far as possible and have tried every mode but am still stuck. The lighting is not bad at all, and should not hurt the pictures as much as they are. They are dark as well, but that isn't the big issue (can be easily corrected in PS). I am not completely versed in advanced functionality so if anyone has any suggestions they would go a long way!