Sit ups are one of the basic conditioning, skill sets. Sit ups help you get stronger abdominal muscles quickly. You can start as a beginner, once you grow strong you may try some modifications to the traditional sit up. The sit up has a great range of motion, it not only works on your abdominals, also works on your hips too. They help in building a strong core. It requires no equipment, all that is needed is a mat and some space.
A sit up has a full movement from face up to an upright torso position. The sit up is performed with the legs straight out onto the floor or with the knees bent. The leg position is different from the curl up which always has the knees bent. Place your hands behind your head with the elbows pointing out to the sides. Exhale as you tilt your hips to straighten your spine, as you sit up and bring your torso toward your legs. Inhale as you slowly lower your torso to the initial position. If you have pain doing the sit up, use a gym ball so that you give comfort to your spine.