Make a fist and tense up the muscles all the way to the shoulder. Relax and change your position so your arm is in a different angle playing a different note on the cords of your tendons and tense up and relax again. Play different tones by changing the angle and hight of your arm and add to this the angle of the wrist itself and the opening and closing of the fingers. The final outcome will be a better understanding of how your body operates and greater ability out of knowledge and awareness. This will come handy in driving for long stretches and in case you are in the armed forces a steady hand on the trigger. Knowing how to play your instrument is essential to survive.
You need to do the work to get somewhere and to do it well to get somewhere good 🙂