Rockband on medium is hard on you

[msbabs32]

So N and I got Rockband2 for Christmas (for all those whom contributed - Thank-you).  I am starting to play on medium and it's um, not easy.  On the drums not only are you doing the kick while doing other notes, you are doing them a lot.  I have to rest my leg and play guitar after only one set.  Guitar on medium.  Guitar/Bass on medium is where you start to feel like you are actually rocking.  However, your fret hand starts to fall off.  Guitar is also a 1 set max before needing to rest.
So I went to do some laundry and noticed that my kick foot and left hand were suprisingly tender.   My pinky will cramp up while typing if I'm not careful.  But do I want to play again?  Damned skippy I do :)