Rectangles are often tall and slender. They are not extremely curvaceous, have a pronounced waist, and a flat bottom. Rectangles have an elegant appearance that many find appealing. They are one of the most common body shapes - estimated to make up approximately 45% of the population. Men are more likely to have a larger percentage of their weight in the form of muscle, while women tend to have more fat and less muscle mass. The average man weighs about 180 pounds (82 kg) and is about 5 feet 11 inches (1.80 m) tall. The average woman weighs about 115 pounds (53 kg) and is about 5 feet 4 inches (1.50 m) tall. There are two main types of rectangles: endomorphic and ectomorphic. Endomorphs have stocky bodies with large bones and heavy muscles that store energy slowly. They tend to be found in sports such as football, wrestling, and boxing. Ectomorphs have thin bodies with small bones and tight muscles that use energy quickly. They tend to be found in gymnastics, dancing, and acting. Both endomorphs and ectomorphs tend to hold themselves against the wall when they walk.