The small intestine has a natural «cleansing wave» — movement of muscles in the lining that serves to empty the small intestine at regular intervals. (verywellhealth.com)
With our passive lifestyles, spending hours each day sitting in one spot in front of our computers this helpful movement of the muscles is not present anymore. (compressioncarl.com)
Dynamic stretching is simply active movements of muscle versus static stretching in which you are holding a stretch for a given amount of time. (mindbodygreen.com)