otto - a calcium defficiency can cause cramps

a QLD player who's a vet was telling us about it at one of the nationals - i was playing for 2 teams so lots of games, and i started to cramp up a bit; so he gave me some calcium tablets and i didn't have a single cramp for the rest of the comp

i didn't change anything else in my diet - but there was no real calcium source in my diet to begin with ;\