This includes the internal and external obliques, rectus abdominis, pelvic floor muscles and multifidus (which helps to keep your spine stable). Start in a push up position with your hands ...

Each consists of the external oblique, which is the closest to the surface and the largest abdominal muscle, and the internal oblique, which lies directly beneath. The muscle fibers of the ...

It's easy to focus your ab workouts on the muscles you can spot in the mirror. But just as important for core strength and overall function are the muscles we can't see in our own reflection.