For the shorter time trials of 10 and 25 miles it’s going to be your pre-race nutrition that is key to your performance, as it is unlikely you will eat during the event. This starts days before, making sure you are eating healthy and consistently throughout the day. Aim to get a portion of carbohydrates and protein with every meal. There should be no need to actually increase what you eat leading into the event, as your natural tapering (reducing your training) will allow your muscles to store the energy from carbohydrate.
Hydration is important as well. Dehydration is not something you can reverse in a couple of hours, in fact it can take several days to be fully rehydrate. Sipping OTE Hydro Tabs regularly is advised in the days leading up to the time trial. As a rule we say ‘always try and stay just ahead of feeling thirsty’.