I'm thinking of trying some magnesium pills mainly because after a long ride, that night I have a hard time falling asleep even though I'm tired and my legs are very stiff. Usually the harder I ride, the longer it takes for me to fall asleep that night. The advertisement for "natural calm" says that magnesium would help in my situation, but who knows. If I do end up trying magnesium, I'll be sure not to take too much,