I feel like I've discovered a whole new set of muscles since learning cha cha, even Alex and the YorkSport Exec couldn't help me find them to stretch out the agony!
I'm really loving learning this though, it's such a whole new style of dancing, I'm having to totally re-program! Sum is being ever so patient with me he's a great teacher. I've learnt the routine now but I just need to remember it and, as Joel said, start concentraing on technique.