Took part in the May Flyer sportive (my first) on Sunday (13th May 2012).
It was going well, averaging 18mph up to the feed station at 33 miles.
After a banana and cake we (my mate Mike and I) got to a steep climb, the one before Coombe Hill at about 42 miles. Half way up I got massive cramp in the back of my thigh (hamstring I think). Excruciating. Have never had cramp during or after a ride before (and it would be great not to get it again!)
Tried to continue but got cramp again near the start of Coombe Hill, but this time in both hamstrings/quads. Had to wait 20 minutes this time for the cramps to go away. For the remainder of the ride I had to push the bike up the hills and cycle gingerly on the flat or downhill bits. In the end I finished 123rd out of 154 which could have been worse. Big thanks to Mike for sticking with me all the way.
What caused the cramp?
A cyclist riding past me on a hill asked if I was ok and when I said I had cramp he asked if I had an isotonic drink. It then dawned on me that I had replaced my usual isotonic Nuun tablets with carb drinks. I'm never as hydrated as I should be so the concensus seems to be that this is what caused the cramp. Have never had to push the bike up a hill since I started 'proper' cycling a couple of years back (although Coombe Hill is a beast and I'm not sure I could have made it even without the cramp after 40 odd miiles!)
Since then I've seen a physio about my back (post an MRI scan) and he's told me my pelvis/hips are out of alignment and he's begun the process of getting it all sorted. He also explained that the alignment problem would hamper my cycling, especially on the hills, and believes the cramp could partly be caused by that. With correct hydration I'd probably have got away with it, but it may have been the combination that got me.
I was initially thinking that sportives might not be for me, but on reflection I reckon the sooner I do another one the better!
[Latest: Saw Scarponi massaging away his cramps while competing in the Giro d'Italia. Chapeau.]