System down!

I had a lousy training just now. I wonder, have you ever felt your body and mind are asynchronous during the training? Like your body is just unwilling to cooperate with your mind to work properly, and everything you do seems not right. I experienced it just now. I kept telling myself to focus more, to do better but just can’t help. Every movement is just clumsy. I even secretly pinched myself to “awake” my spirits. Also, my heart pounded unusually fast at the beginning of the training. What’s wrong with me?? Hmm… just hope that tomorrow same thing won’t happen again in the training. I am looking forward to a good training tomorrow.