The body is most receptive to healing during sleep, so this is the most beneficial time for grounding.
But just as you can’t direct healthy food, air, or water to create specific effects in one function or part of your body, grounding allows your body to receive the natural energy of the Earth and then uses it as needed. You may experience benefits for certain issues you were not even expecting improvements in and there may be no change in other areas. Generally, the longer you continue to ground yourself, the more benefits and vitality you can expect to see.