During my Takumakai Daito-Ryu Aikijujutsu practice sometimes I get cramps, even when I stretch before hand. Once or twice I got it while sitting (traditional japanese way) in my foot, and when we do certain stretches too. I think it's just because I'm not flexible or something (since for the last 10 years I've basically sat infront of the computer). I'm jut curious what stretches I can do, just every now and then to stop cramping in my foot and my legs. Or rather what the best ones to do would be.