Because the whole leg length is not easy to measure, some measurable data are usually used to represent the leg length in practical work, and the leg length is generally expressed by hip height and height MINUS sitting height. Hip height: 78.33cm for Asian males and 71.45 cm for Asian females; The average male in Europe and America is 83.72cm, and the average female in Europe and America is 77. 14cm.
As shown in the figure, measuring the leg length of the book against the wall is simple and practical, just measuring the vertical distance from the mark point on the wall to the ground. The leg length obtained by this measurement method is the vertical distance from the perineal point to the ground, that is, the crotch height. Leg length = height-sitting height: 78.8cm for Asian males and 72.37cm； for Asian females; The average height of men in Europe and America is 84. 19cm, and that of women in Europe and America is 77.74cm.
Height minus sitting height is about the same as hip height.
Note: Sitting height refers to the vertical distance from the apex (V) of the finger to the chair surface. When measuring, the thigh must be parallel to the ground and at right angles to the calf. Never sit directly on the ground. Because, when sitting on a stool to straighten the trunk, the angle between the big leg and the small leg changes from 90 to180, and the trunk naturally contracts.