I've been practicing my beep test and have suddenly hit a ceiling with it and just can't seem to break through it. Breathing is ok, bit hot and bothered but no dramas but my legs are in agony. I think I might have got shin splints as have a painful sensation up both shins - the sort of feeling you get when you twist and ankle, but in my shins. Can anyone suggest a way of getting through it? Even sitting down, about 20 mins after stopping and they're still v painful.