I didn't realize others had cramps, too. I thought it was me being weird. I don't get cramps during a ride mainly because I limit my rides to 20 - 22 miles; I get cramps hours later. The cramping is so bad sometimes that my calves feel bruised the next day. Since I'm a newby to bike riding, I don't know what to do about it. I tried Guu but that made me sick; it's so icky. I take 1500 mg of CA every day so that isn't helping and magnesium gives me the runs. Any other ideas?