What are the abdominal muscles developed through sit ups

The abdominal muscles trained by sit ups are mainly the rectus abdominis muscle, which may also involve the auxiliary participation of the external oblique and internal oblique muscles. The rectus abdominis muscle is a long strip of muscle located directly in front of the abdomen, divided into left and right columns, and separated into multiple muscle bellies by tendons, forming a common block like appearance. The external oblique and internal oblique muscles are located on both sides of the abdomen and are responsible for the rotation and lateral flexion of the trunk.

Sit ups mainly stimulate the rectus abdominis muscle, especially the upper abdominal area, by bending the spine. When the body is rolled up from a supine position, the contraction of the rectus abdominis muscle produces force, bringing the sternum closer to the pelvis. This action can effectively enhance the muscle strength and endurance of the rectus abdominis muscle. Long term regular training can thicken muscle fibers and form distinct muscle lines. However, it should be noted that simple sit ups have weaker stimulation on the lower abdomen and deep transverse abdominal muscles. The external oblique and internal oblique muscles of the abdomen are mainly involved in maintaining body stability and assisting rotational movements during sit ups. If lateral rolling or twisting movements are added to sit ups, it can enhance the exercise effect on these lateral abdominal muscle groups. To achieve clear abdominal muscles through sit ups, it is necessary to combine whole-body weight loss training and dietary control. The degree of manifestation of abdominal muscles is closely related to body fat percentage, and men usually need to lower their body fat percentage to see a clear contour of abdominal muscles. It is recommended to combine aerobic exercise and core strength training, such as plank support, hanging leg lifts, etc., to comprehensively strengthen the abdominal muscles. Simultaneously maintaining protein intake and calorie control, avoiding high sugar and high-fat diets, can effectively demonstrate exercise results. During the training process, attention should be paid to the standardization of movements, avoiding neck compensation, and gradually increasing intensity.