Which university are you at? best rx promotions My doctor was very clear in his directions. I developed rhabdo from combining marathon training with increasing fitness goals in CrossFit. I could do both, but I had to find a balance between them. Ten weeks later, I crossed a marathon finish line. Three years later, I'm still running and still going to CrossFit. I know my limits. I know it could happen again. But I know the symptoms and I trust my trainer.