Your core includes all of the muscles that attach to your spine and pelvis, including your glutes, back and chest. While a toned tummy is nice, core work is about so much more than looks.
Whether you exercise at a gym or at home, the following 8-minute ab circuit is a strong finish to your workout and hits all the core muscles from obliques to the lower back and glutes.
Mastering the basic sit-up is a great place to start for working your upper and lower abs.
The superman works the back side of the core, including the lower back, glutes, and hamstrings, while also throwing in a little bonus upper back and shoulder work.