1, o leg
O-leg is called "genu varus" in medicine. When the lower limbs are naturally straight or standing, the medial malleolus of both feet can touch each other, but the knees cannot be brought together, which is the main manifestation of deformity. Calcium deficiency and heredity are two foundations for the formation of O-legs, but the more direct reasons are walking posture, standing posture, sitting posture and some exercise.
2.x-shaped legs
X-shaped leg is an abnormal phenomenon of bone and joint caused by congenital inheritance, acquired malnutrition and incorrect sitting and walking posture in childhood, which leads to adduction and pronation of femur, abduction and supination of tibia.
3, standard leg type
When the standard leg stands at attention with the toe close to the heel, the thigh, knee, calf, medial ankle and toe close at five points, and the five places are separated by four. The standard leg type includes leg length, leg-to-body ratio, leg circumference, thigh and calf length and other factors.
Extended data
O-leg hazard: normal knee joint, pressure is evenly distributed on the joint surface. On the other hand, people with O-legs have too much weight concentrated on the medial articular surface of the knee joint due to varus knee joint. Excessive pressure and friction will lead to the wear of the medial cartilage surface of the knee joint, the collapse of the tibial plateau and secondary osteoarthritis. Older people are prone to joint pain, which affects normal walking activities.
X-leg correction method:
1, sit with your legs straight, put your hands on the ground, put a soft object (such as a ball) between your knees, and tie your ankles with a rubber band. Practice for 5 minutes. Require the calf to clamp the object hard.
2. Open your legs in two places, separate your knees to both sides as far as possible, stand up straight, straighten your back, bend your knees, slowly lift your heels, then drop them, and repeatedly lift and drop your heels until your calves feel sore.
Leg length measurement of standard leg type: Leg length = height-sitting height: average 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.
Baidu encyclopedia -X leg
Baidu encyclopedia-genu varus
Baidu encyclopedia-standard leg type