Measurement method: upper body: after standing up straight, slightly lower the head and count the first vertebra from top to bottom to below the hip; Lower body: from below the hip to the bottom.

1, upper and lower body ratio.

Male: Because boys develop late, the lower body is longer than the upper half 10cm.

Female: Because girls develop earlier, the lower body is longer than the upper half 12cm.

2. Body shape

Men and women: the figure should be thin, but not too thin. Because you have to do some movements with a lot of exercise, such as jumping and spinning;

The head should be smaller, the neck should be longer, and the shoulders should be slightly shouldered (especially for girls)

The back spine should be straight (measurement method: draw vertically from one spine to the coccyx with your thumb to see if it is vertical), and the vertical pair has better balance control when doing the action.

Spread your arms, the elbow joint should be smaller, not too prominent (girls who are too thin are not included).

The arch of the foot is higher, which is more conducive to jumping. The first three fingers on the toes are in a straight line, otherwise tiptoe will easily cause the second finger to deform. The instep should be tight.

Of course, it also depends on the size of parents.

Second, physical conditions.

1. Gentle

Side leg. Hind legs. Waist softness (softness should not be too good, because it involves strength and is difficult to control)

2. Openness

Methods: Lie on your back, with your back close to the ground, your legs bent, your feet facing each other (frog style), and press your knees.

Lie flat, with your back close to the ground, one leg straight and the other leg spread out to see if your hips can be close to the ground.

Third, others.

1, explosive force

Jump up to see the height, high altitude control.

2. Sensitivity to music

The teacher gives a piece of music, such as 42 or 43 beats; Walk in circles according to the beat, and then the teacher will change the beat halfway to see the students' reaction ability;

The teacher plays a piece of music and the students improvise.