Hi,

I've been riding for a couple of months and I've just started cycling longer distances/times. I rode 30-40 minute per session for a month for 3 days a week. Now we've decided to train for a 100 km race and I'm riding 1-3 hours at a go.

I'm finding that the next day or two even if my body is in good shape I'm having a terrible time concentrating on anything. My head feels like it is full of cotton.

I suspect this is a nutritional thing and I need to up something, but what? Protein? Carbs?

Any help appreciated. If I can't get this sorted out, I'll have to pull way back on my training and skip the next race. I'm starting to really enjoy riding, so I don't want to do that!