As the summer has neared its end and the never-ending heatwave has begun to subside, many runners will be starting to think about training for a longer event. Whether it is for an autumnal half-marathon or for something even longer in the spring it’s a good time to reassess how you are going to fuel it all. Because for many runners their primary focus is firmly set on the bare bones of their training plan and the necessary kit they’re going to need to get them through the upcoming weeks and months. And this is fine because at first you may be flying through the training and feeling slightly complacent about what’s ahead of you. But in reality, every runner knows in the back of their mind what is coming up. As you ratchet up the mileage in your legs you will inevitably have to face the prospect of doing some rather daunting long runs.