[Krebstar]

I've never tried holding Y down for long periods of time. I've held it down right before a defender was about to tackle the runner and it's worked. Does holding it down while running do any better? I would think it limit speed and mobility. Or, do you just mean hold it down when the defender is near?

Another general running tip, don't sprint through the hole. Get through, then sprint or use your charge. I've found that if you sprint through the hole, you're more likely to run into a blocker and defender and be tackled.