Is there a way to tell if you're sprinting? I can't clear the jump in the abandoned mine...
Edit: Or maybe I need more gems? I'm starting to dislike this. :/
If you're trying to use magic to clear a long jump, try casting it multiple times, not just once. With 3x magic and the double jump, you should be able to get across anything.
As far as sprinting goes, I think it defaults to always dash being on (once you get the ability); there might be clouds of dust at Adol's feet when he dashes, but I don't recall.