Buttock in the context of Back

The human back, also called the dorsum (pl.: dorsa), is the large posterior area of the human body, rising from the top of the buttocks to the back of the neck. It is the surface of the body opposite from the chest and the abdomen. The vertebral column runs the length of the back and creates a central area of recession. The breadth of the back is created by the shoulders at the top and the pelvis at the bottom.

Back pain is a common medical condition, generally benign in origin.

Sitting is a basic action and resting position in which the body weight is supported primarily by the bony ischial tuberosities with the buttocks in contact with the ground or a horizontal surface such as a chair seat, instead of by the lower limbs as in standing, squatting or kneeling. When sitting, the torso is more or less upright, although sometimes it can lean against other objects for a more relaxed posture.

Sitting for much of the day may pose significant health risks, with one study suggesting people who sit regularly for prolonged periods may have higher mortality rates than those who do not. The average person sits down for 4.7 hours per day, according to a global review representing 47% of the global adult population.

The human leg is the lower limb of the human body, including the thigh, knee, lower leg, ankle, foot, or sometimes even the hip or buttock region. There are thirty bones in each leg. The major bones are the femur (thigh bone), tibia (shinbone), and adjacent fibula.

The part of the leg between the hip and the knee is called the thigh. The part between the knee and the ankle is called the lower leg, shank, crus, or in anatomy simply as the leg. The lower leg includes the shin in the front and the calf at the back.