Replying to Summer Ski Preparations

Following on from the summer activities to keep your mind of skiing and take its place, what sort of gym/exercise do you do to prep yourself for the season, I'm specifically thinking for improving core/balance for the park.

I have noticed all the pros are ripped and when I tried my first cork 7 I got to about 360/450 and my core kinda gave out and I opened up. Fell like a sack of shit outta the sky.

I'm sure crunches and variations of crunches do wonders for your core etc and some balance ball stuff are also key, I'm just curious if anyone has any personal preferences of regimes that they use themselves.

I'm also constantly trying to beef up my rotator cuffs and general shoulder surgery as I had a double labrum repair a few years ago and never fully fixed em with physio. So anyone with experience in that area as well would be awesome.

And get a skateboard it's hard as shit but I love it