your mind, but it's resting. you will see that it is really beneficial for you. it will allow you to concentrate much better in karate and thus to progress.
likewise, in your everyday life, practicing meditation will do you good. when you have a task to do, a job to do, you will be much better at staying focused. you focus on something, you empty the cup full of dirty water. you arrive with your new thoughts all beautiful and all clean. and there, you get to work, and stay focused on the goal you have.
after a vacuum during the five minutes of your meditation, you can think about it. for 