In ancient times, there was a traditional game called jumping cypress. Guess what this is?

In ancient times, there was a traditional game called jumping cypress, which was skipping rope.

Introduction to skipping rope:

It is a sports game in which one or more people do various jumping movements on a looped rope. This game was called "Head Rope" in Tang Dynasty, "Jumping Rope" in Song Dynasty, "Jumping Hundred Ropes", "Jumping White Rope" and "Jumping Horse Rope" in Ming Dynasty and "Jumping Rope" in Qing Dynasty. Skipping rope, as an ancient folk entertainment of Han nationality, has been used every festival since the Southern Song Dynasty, and every household has to compete.

Motion principle:

A cycle of skipping rope can be divided into three stages: take-off stage, flying stage and landing buffer stage. In the take-off stage, with the change of joint angle of lower limbs, the pedaling force gradually decreases. In the initial stage of take-off, the angle changes slowly, but in the final stage, the ankle and knee joints change significantly faster.

At this stage, the rope speed increases from the front of the head and accelerates to the feet off the ground. In the flying stage, the hip joint, knee joint and ankle joint remain unchanged, the rope speed decreases slightly before "crossing the foot" and increases slightly after "crossing the foot" to ensure that the skipping rope stays in motion and make adjustments for the next acceleration.

In the landing buffer stage, the joint angle of lower limbs decreases obviously, and the ground reaction force increases gradually. At the same time, the body's center of gravity drops, skipping rope is just in the rising period, and it is more difficult for the upper limbs to exert their strength upwards. The decrease of rope speed accords with the natural law of human movement.

Choice of skipping rope:

Beginners can choose beaded ropes. Beaded rope is made by splicing beads and plastic pipes, and has a certain weight. When shaking, you can feel the "rope feeling" better, and at the same time, the sound of hitting the ground is clearer, which helps to keep the rhythm and coordinate the movements. Because the knot hurts less when it hits the body, it is very suitable for beginners.

In addition to choosing the right skipping material, it is also important to choose the right handle. If we want to pursue the speed of skipping rope, then the axis of the handle needs to be smooth, and the smoothness of the rotating shaft is the highest, followed by the bearing and finally the hollow shaft. If you want to jump out of all kinds of tricks and worry about skipping rope and knotting, you'd better choose a handle that is three times the width of your palm.

Skilled people can choose to use wire ropes. When the coordination and endurance are gradually improved, if you pursue skipping speed, you can choose to use wire rope. The wire rope is thinner and lighter, suitable for speed jump and endurance jump. Rubber rope for advanced users. Rubber skipping rope is lighter, stronger and more wear-resistant, which is beneficial to improve the skipping speed.