[nato]

Hey guys just after a few ideas in regards to an issue i have with mainly my legs cramping up. I eat pretty well and i drink heaps of water but after an hr or so of riding hard i get the feelings of cramps starting to take off. Which usually ends up with me trying to push on but nurse my legs as much as possible so it doesn't get too harsh. Any ideas how to eliminate this? Perhaps i need to hit the gym to work out my legs? Cheers nato.