In a regular yoga practice, you don’t even need to be standing outside or meeting the actual ground. Just locate the points of contact (feet, hands, sitting bones) and exert enough pressure to make you feel really rooted into the floor as if you are pushing it away while it pushes back.
“Inducing the body’s relaxation response allows us to go into a natural healing mode. Often called “rest and digest”, it comes into play when the parasympathetic nervous system is activated...Vibrations from the Tibetan singing bowl are used to stimulate specific brain wave states that initiate the relaxation response. The specific states these frequencies induce are known to bring peace and harmony to the mind and body. “