Midsection

Midsection is a term used to describe the middle portion of an object, area, or body. In human anatomy, the midsection of the body generally refers to the trunk between the thorax (chest) and the pelvis, commonly called the abdomen or torso. It includes the abdominal wall, abdominal cavity, and surrounding tissues.

Anatomical contents and boundaries: The midsection houses major organs such as the stomach, intestines, liver, and portions of the kidneys, along with muscles of the abdominal wall and other tissues. It is bounded superiorly by the diaphragm and inferiorly by the pelvic inlet. The midsection plays a key role in respiration, digestion, and core stability.

Measurement and health relevance: In health and fitness, midsection measurements are used to assess body composition and disease risk. A measure taken around the midsection, typically near the navel, provides a practical indicator of central adiposity. Related metrics include waist circumference and waist-to-hip ratio, which are associated with cardiometabolic risk and can reflect changes in fitness, nutrition, or medical status.

Other uses and contexts: In clothing and garment design, the midsection refers to the waist or torso length and affects fit and sizing. In engineering or architecture, the term can denote the central or cross-sectional region of a structure or vehicle, often used in discussions of balance, strength, and design symmetry. The exact meaning of midsection tends to vary by field, but it generally denotes the central or middle portion of a subject.