The goal of this exercise is to minimize body fatigue and at the same time focus on key muscles. It mainly uses the muscles of the abdomen and the back. Some of the great routines for pilates involve the pelvis and the abdomen. There is also the bent knee fall out that involves the lower abdomen, quadriceps, and the inner thighs. Another routine is the bridge which involves the buttocks, lower back, legs, and glutes. Also, there is the heel slide routine which targets the lower abdominals of the body. Lastly, there is the ribcage arm routine. From the name itself, this mainly involves the arms, the ribs, and the abdomen.