You've trained for months. You've contained your nerves. You've travelled across the country. But... your laces keep coming undone, your legs are hurting early, and the pain of your feet rubbing is worse than the pain of running itself.
It doesn't matter what sport you do, you will have heard of 'marginal gains.' But what about last minute 'maximal gains'? Those last-minute additions to your kit bag, which really make your run not just good, but great.
First up, nutrition. This is the building block of your day's success.
Science in Sport work with sports scientists and food technologists as well as keen athletes and sports people to develop products that deliver the right balance of nutrients.
With a whole range of flavours to choose from, you're not going to get bored.
We love the Science in Sport GO Hydro Tablets (20 Tabs) - they make water more interesting and replace electrolytes lost through sweat.
Calf sleeves may look odd at first, but watch most long-distance athletes on TV and you'll see they're commonplace.
The reason is that there's nothing better you can do for your lower leg than employ some support – to not only to reduce calf muscle ache during the event but also help recovery and reduce the chance of shin splints.
Your feet can take a hammering during a running event. If you've ever suffered from blisters you'll know that socks designed specifically for runners are a worthwhile investment.
The Hilly Marathon Fresh Anklet have a flat toe seam to help prevent blisters and the anatomical design provides support and cushioning exactly where it's needed.
Stay hands free with a hydration vest. Designed for the long run, all your essentials are kept safe, sound and on hand.
This bag from OMM, features 2x 500ml storage space alongside a 2 litre bladder on the back and weighs just 270g!
With a volume of 5 litres, it is great for keeping essential nutrition, layers and essential supplies.
Elastic laces are a great way to keep your feet secure, without the fiddly nature of normal laces.
A colourful and inexpensive way to avoid getting tripped up.
An essential to any awesome run, these running shorts from Ronhill pack a punch. Designed with breathability and comfort in mind, they are a perfect match for warmer climates and long runs.
The shorts come with an inner short to help with movement and wicking performance, keeping you cool. The snug design is secure, with a small pocket on the back of the shorts to store your valuables.
Carbs and protein are likely to be the things your body craves most after a hard event.
A dedicated Recovery Drink will give your body all it needs, in a tasty package; and they can be easily consumed in the golden 20 minutes after the event.