I'm no expert on these matters but most of the skate/bmx/etc. photographs I see are wide angle close up shots so I would consider doing something different such as moving back and using a longer lens. This would also compress the perspective somewhat and give a different look possibly showing the competitors more in context with the surroundings e.g. foreground and background. The usual close up wide angle shots usually show a lot of sky as they are taken pointing upwards, usually at the apex of a curve.
However, what I'm describing is just a different way of taking action shots so may not be exactly what you are asking.