I've read that sodium depletion is one of the main ways to obtain muscle hardness b/c it sucks the water out from under the skin. Does anyone know how to do this? Do you sodium load first? How long? How much? How low do you need to bring your sodium level? down to zero? It seems like nearly every food has some sodium in it, so it looks like this would be really hard. Looking for a good sodium depletion plan. Thanks.