What are the muscles that keep the body upright?

Glutes, quadriceps.

Calf triceps.

Ten. 5. The gluteus maximus muscle is very well developed, directly located on the posterior lateral surface of the pelvis, maintaining an upright posture of the human body. When near fixation, extend and pronate the thigh, such as the back swing and back kick. The upper half of this muscle abducts the thighs and the lower half adducts the thighs.

In distal fixation, one side contracts to turn the pelvis to the opposite side, as in a turning motion, and both sides contract to tilt the pelvis backwards.

Sustain people. Body upright posture. Exercises such as prone "back legs", weight-bearing leg flexions, and weight-bearing body flexions develop strength in this muscle.

Ten. 6. Quadriceps This is one of the most powerful muscles in the human body, located under the skin on the anterior surface of the thigh, and has four heads, namely the rectus femoris.

Vesus medius, exterior femora, vastus medialis. When near fixation, the thigh is flexed and the calf is extended; When distal fixation, make the thigh at the knee joint.

Extension means pulling the femur forward (e.g., from squatting to standing); Keep the femur vertical and maintain the upright posture of the human body. Adopt.

Weighted squats. Exercises such as weight-bearing calf extensions develop strength in this muscle.

Two. 10. The triceps calf muscle is located in the superficial layer behind the calf and is particularly developed, so that the back of the calf is raised, and it is composed of the gastrocnemius muscle.

and flounder. Muscle composition. Flounder muscle.

Located deep in the gastrocnemius muscle. When immobilized, the lower leg and foot can be flexed. When distally immobilized, make the femur distant.

The lateral ends and lower leg bones are pulled back to straighten the knee joint, from which the body is kept upright.

Glutes, quadriceps, triceps calves.

1. The gluteus maximus, located on the posterior lateral surface of the pelvis, maintains the upright posture of the human body, extends the thigh backward and pronation when it is nearly fixed, such as the posterior swing leg and the back kicking action, the upper half of the muscle abducts the thigh, the lower half makes the thigh adducted, and when the distal fixation is fixed, one side is contracted to rotate the pelvis to the opposite side, such as the rotation action is contracted on both sides to make the pelvis tilt backward, and the upright posture of the human body is maintained.

2. The quadriceps muscle, located under the skin on the anterior surface of the thigh, has four heads, namely the rectus femoris medius, the external femoris muscle, and the internal femoral muscle are nearly fixed to flex the thigh and extend the calf, and when the thigh is far fixed, the thigh is stretched at the knee joint, that is, the femur is stretched forward, and the femur is maintained vertically to maintain the upright posture of the human body.

3. The triceps calf muscle, located in the superficial layer behind the calf, is particularly developed, making the back of the calf bulge, which is composed of the gastrocnemius muscle and the soleus muscle, and the soleus muscle is located in the deep layer of the gastrocnemius muscle. In near fixation, the calf and foot can be flexed, and when the distal femur and calf bone are pulled backward, the knee joint can be straightened, and the human body can be maintained upright.

When our body is upright, the muscles of the whole body need to be forced, so you can use all your muscles, including the one on your face, although you can't feel it.

The muscles that keep the body upright are the quadriceps, glutes, triceps calf.

The quadriceps muscles are the body's thigh muscles, located in front of the thigh muscles, and the first thing to make the thighs strong is to develop the quadriceps, because the quadriceps muscles are one of the largest and most powerful muscles in the human body.

The gluteus maximus is one of the posterior hip muscles, which is a broad quadrilateral muscle that allows the thigh to be extended and externally rotated, and the lower limb is immobilized to straighten the trunk and prevent the trunk from leaning forward to maintain balance.

The triceps calf muscle, located in the posterior group of the calf, is mainly composed of the gastrocnemius and soleus muscles.

The role of muscles

1. Protective effect on the human body: muscles surround important human tissues such as bones, internal organs, nerves, blood vessels, etc., and when the human body is invaded by external forces, muscles can protect important organs of the human body from injury.

2. Maintain the activities of the human body: the contraction and relaxation of skeletal muscles play the most important role in driving the human body to complete a certain range of activities, such as running, smiling, etc. The continuous contraction and relaxation of the heart muscle can pump blood and supply blood to the whole body.

Slow peristalsis of smooth muscles, such as those of the gastrointestinal tract, can act as a transporter of food.

3. Connecting bones and joints: The connection of joints is inseparable from the connection of muscles, and muscles can drive joints to move.

The muscles that maintain the upright posture of the human body in trouser beats are ().

a.Pure Qi spinal muscles.

b.Calf triceps.

c.Gluteus maximus.

d.Quadriceps.

Correct answer: ABCD

The main muscles are triceps calf, quadriceps, gluteus maximus, and erector spinae.

Gastrocnemius muscles, quadriceps, abs, lumbar muscles.