It is good to shower before meditation. If a person showers after meditation, it is best to wait 30-60 minutes. It is best not to shower immediately after meditation because it shocks the nervous system. Also, studies show that chemicals are produced on the skin during meditation which are beneficial to the skin; we don’t want to wash them off. For the same reason, we don’t want to meditate and then go swimming, nor is it a good idea to meditate in water (nor saunas, steam rooms, etc…).