Then you can not see the ball clearly and you change the position of the pivotal center with relation to the ball.Keep both feet planted on the ground so your weight is supported on the flat of your feet when you connect with ball.So there should not be a violent effort keep your head still and make sure your club head is going straight when you meet the ball.
This could also help you out in relaxing while enjoying the game you are playing.
Unfortunately, being able to hit the ball hard doesn’t equal good golf.
If you just need a little stress relief, go for it!
Keep your head still and your center of gravity will not change.
A sudden effort made with one of your legs or both will cause your head to move.