Something to think about is replacing calories whilst you're running. Not because you'll run out and bonk during the run but because if you are training regularly then you need to be replacing your stores (or not using them in the first place) to allow for tomorrow and the day after's efforts.
I'm pretty bad at this but anything much over an hour I'll try to take more than just water with me. The advice often is start drinking sports drinks after 20mins.
Something to think about is replacing calories whilst you're running. Not because you'll run out and bonk during the run but because if you are training regularly then you need to be replacing your stores (or not using them in the first place) to allow for tomorrow and the day after's efforts.
I'm pretty bad at this but anything much over an hour I'll try to take more than just water with me. The advice often is start drinking sports drinks after 20mins.