Hi Futurity – the best option is to go for carbohydrate-free electrolyte solution so that you’re getting your carbs via gels and your electrolytes via the fluid. This will minimise the risk of stomach troubles. I’m pretty sure SIS do an electrolyte only drink – maybe GO Hydro or something? Also make sure you have a ‘hot day’ outfit sorted for marathon day, in case you need it. One that you’ve worn on a training run to check all OK, no chafing etc. A visor can be good for keeping sun off face without making your head hot.
It looks like you might get a chance to practise a few more hot day runs over next fortnight or so – so you’ll be a bit more accustomed come race day. And bear in mind, how you felt at Cambridge could be to do with fatigue, poor pre-fuelling, poor pacing or something else – so don’t overstress about the weather turning a bit warmer. Hope it goes well!
Many thanks for your response. I didn't realise that some electrolyte drinks have carbs in as well. I have only used the Zero High 5 tablets in the past so will look into what else is available. I may go down the visor route as well as I don't mind wearing hats but they normally make my head too hot as you say.
I am training for my first marathon, London, and training is going (touch wood) alright. However, I ran the Cambridge Half at the weekend and really suffered as it was a warmer day than we've been used to. I ended up walking alot and felt on the edge of dizzy for a lot of the time. I noticed that when I rubbed my face there was salt. I drank water on the way round and had SIS gels but now realise I should probably have had electrolyte drinks. The thing is I suffer badly with my tummy and I am not sure whether those drinks + the gels will be too much for my stomach on the day.
Any advice would be appreciated on this matter (especially the stomach department!) and also how else to deal with a hot day (and I know London can sometimes can be quite warm on the day!).