yea doing legit crossfit is going to beat up your body and it really puts a lot of strain on your bones/joints. you have to make sure your resting a good amount and eating plenty plenty of healthy foods to replenish your body.
easily increase your daily water intake by at least another liter or youll end up crashing
2008 335i Coupe [05/2010]
2011 128i 6MT ///M-Sport [12/2012]