I have carried out a couple of competitive rides recently, one a 25m TT and the other a 50k off-road, where I have suffered from cramping in my calves (starts in left but then both). I regularly cycle hard, long distance and for 6+ hours and have never had this problem before. I don't believe that my diet is deficient in Sodium, Potassium etc and in neither case was it particularly hot or was I sweating a lot. However both times I drank very little for about an hour, in the TT because I wasn't carrying any and in the off-road because I was concentrating too much on staying on the bike (although I had a Camelbak) The off-road was a two stage event going on to 90k, I had to pull out because of the problem which depressed me not a little as I was going reasonably well. Any advice with this little conundrum warmly appreciated
Thanks
Sean
Thanks
Sean