yea, learn to lean foward when you land for sure. I used to get it so bad, so much that i couldnt lean foward into my boots any more, and i thought it was because they were to stiff. it got pretty bad so i went to see some one and it was cause i was leaning back to far especially on landings, and it stretches the shit out of your mucsles covering that bone and sometimes splints the bone. so i changed how i jumped, learnt to get myself more foward on jumps and it helped me progress my skiing a shit load too