Sorry, I'm a kiwi
Thoughts from the brain trust. I have an issue with cramping well before I'm "tired". Isn't normally a problem on rides less than 30km which are the majority of my mtb ride lengths. Mainly over longer events such as 4hrs etc. So due to the upcoming Port to Port I've been clocking up longer kms, time in the saddle and climbing. 50% road and 50% mtb as that's all the time I have. About a month ago my wife and I did a 4.5hr ride of about 60km and 1500m vert m and I felt strong, so was feeling confident. Then 2 ish weeks ago I did a 4hr. The pace was quite gentle as my wife was doing the 24hr solo so she was leading. 40km in I started to twinge. 48km I cramped big time in my left hamstring. Took about 10 minutes to get it to finally stop cramping. The day was about 28c and I had drunk 1L of maximus and 1L of water the night before. Before starting the ride I had drunk about 500ml of maximus and 500ml of water. Up to the point of cramping I had drunk about 900ml of Infinite. Now I had had a bad week with migraines all week and over the 5 days before had taken about 10 Nurofen plus and 4 Panadol Forte and lots of nurofen and panadol in between. I'm throwing that in as it may be important I don't know? I wasn't sweating a lot as the pace wasn't hard as I've said. Any ideas of things to try or could the drugs have affected my hydration? I'm bad at stretching but working on it. But I rarely stretch before a ride. Could stretching be my main issue?