I'm currently increasing my cycling distance in anticipation of doing the 100k option of the dartmoor classic..as I havent been on a bike for a few years my initial rides were about 6miles...i'm starting to increase this and last night doubled this amount...but i got severe cramp in my right calf..I could feel it coming on and dropped down a few gears to lighten the load on my legs to squeeze out the lactic acid...but it still came on..how can I avoid cramping and how best recover from it if I do get a bout?