Posted: 20/08/2008 at 12:56
RP, danowat is right. I'm assuming your 11 miles took you over an hour and a half to run? If that's the case then you need to take on board an energy gel, maybe even two. Yes, they taste yuk but they serve a purpose. For your next 11 miles, try taking a gel at 4 or 5 miles (you won't feel like you need it at this stage but it takes a while to kick in). If you're starting to flag badly again at 9 miles or so, take another. You need to experiment now to see what works for you, not on race day.
Apart from the gel(s), IMO the best thing you could do to get you through another long run is to run with someone else. Chatting definitely helps the miles go in.