digestion. 1  the process in the alimentary canal by which food is broken up physically, as by the action of the teeth, and chemically, as by the action of enzymes, and converted into a substance suitable for absorption and assimilation into the body. 2  the function or power of digesting food: My digestion is bad.
Overview of Sitz Bath. A sitz bath is a bath in just enough water to cover the buttocks, upper thighs and lower abdomen. It is more labor intensive than other hydrotherapy treatments, but it powerfully affects the pelvic and abdominal organs.
Proper Technique. The most important facet of a proper sit-up is working the abdominals. Near the end of a vigorous set of sit-ups, you may start to include your arm, shoulder and upper back muscles to get you through the set.