The physical body, in modern times, needs more movement than it gets ... The physical body is under-stimulated. So, go exercise; go stimulate it. The stomach is over-stimulated. We eat too much. We drink too much. So, you fast to take care of that. The mental body is probably over-stimulated with junk food and under-stimulated with healthy food. So, you probably need to consume less social media and maybe more podcasts or maybe more books.