I can personally vouch for the advice given above, i.e. mileage and intensity of training. When I first started cycling just over 4 years ago, I would frequently cramp in races after about 60km or so. I tried everything to combat cramping, like Crampstop, Rennies, Slowmag, etc, but nothing seemed to work for me. The trouble was that I was simply not putting in the miles. My longest training ride was never more than two thirds of the race distance, and that was only once a week. The rest of the week would be about 3 short rides of about 20km each. The turning point for me was when I joined a cycling club just under 2 years ago. The discipline of club rides on the weekends got my mileage up and soon I was riding two long rides each weekend with distances often equal to race distances, and sometimes even longer. I was also challenged to increase my pace as I advanced from the slower club batches to the faster batches. Almost overnight the cramps stopped as my body became used to the distances and pace. The old adage holds true - “No pain no gain”.
