Cycling Fitness / Training Advice

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gillies

I get headaches after rides sometimes. Had a stinker after 3.5 hours yesterday.

Pretty sure it's not dehydration as I drank about 1.5l during the ride and about 3 pints of water in the hours after it.

Any suggestions?

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skinny in reply to @gillies

electrolyte imbalance.

1.5L in 3.5h is on the lower boundary of OK. You need more, especially if it's warm. The recommendation is 500ml-1L or above. Depending on how warm it is and your sweat rate.

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