Is there any way to select the core "pelvic floor" muscles (or whatever their technical name is)? Beyond anything to do with incontinence, my understanding is that they are intimately involved with back pain and are one of the most important muscle groups to strengthen, as flexing them (or not) influences the position of most other parts of the body. (When people say "walk tall", what they really mean is "turn your p…
Mind you, that's probably entering into the realm of physical therapy as opposed to fitness / weight lifting.