These are also called core exercises. That is, the core part of the body, the actual middle part; exercises that strengthen the trunk in a way. Gases in the organs inside the body, namely in our lungs and intestines; it is surrounded by large muscle groups, like a very solid-walled balloon. It is this middle region that forms the fulcrum of many of our movements.
Abdominal muscles in the front and lower back muscles in the back; they work to support each other. The skillful balancing of their mutual strengths is crucial. Making any of them weaker than the other with an operation, as well as making them stronger than the other with unplanned exercises, also disrupts this balance. This is why core exercises should form the basis of all personal training plans.
