Roller skating can't be called anything.

Roller skating cannot be called pulley. The two are different.

Roller skating: Roller skating refers to a sports event that uses various wheeled equipment to slide. You can practice speed roller skating, figure roller skating, roller skating, extreme roller skating, skateboarding, freestyle roller skating, roller skating games, leisure roller skating and classification projects in different places, and you can also carry out activities in the form of competitions, training, performances, training, exchanges and entertainment. They are an important part of social sports and school sports, and also a member of competitive sports.

Pulley: Pulley is divided into "crown block" and "moving pulley", which is a round wheel that can rotate around the central axis. There is a groove on the circumferential surface of the round wheel, and the rope is wound around the groove. If both ends of the rope are pulled hard, the friction between the rope and the round wheel will make the smooth wheel rotate around the central axis. The pulley is actually a deformed and rotatable lever.

Next, I'll introduce you to the role of roller skating and pulleys.

roller skating

1. Enhance the coordination and balance of the body. Roller skating is beneficial to the balance, flexibility, adaptability and thinking of the body.

2. Exercise joint support ability and flexibility. When playing roller skating, the knee joint and ankle joint need to support the body properly, and complete the actions such as supporting, sliding and turning, which has a good exercise effect on joint support ability, especially flexibility.

3. Whole-body aerobic exercise can improve the whole body and mind, and roller skating correctly can actually improve your whole body and mind, because roller skating itself is a kind of whole-body aerobic exercise. An athlete who has mastered the basic skills of roller skating will have an "effective exercise heart rate" of 120 beats/minute. At the same time, in the process of roller skating, the muscles of the waist, buttocks, thighs and ankles are exerting strength. People with good skills will use reasonable swing arms to strengthen the balance of the body, improve the sliding effect and exercise the upper limbs and even the chest muscles. So roller skating is in line with the basic elements of aerobic exercise.

pulley

The main function of pulley is to pull the load, change the direction of force application and transmit power. A machine consisting of multiple pulleys is called a "pulley block" or a "compound pulley". The pulley block has great mechanical benefits and can pull heavy objects. Pulleys can also be chain-driven or belt-driven components that transmit power from one rotating shaft to another.

Conclusion: Although roller skating and pulley are both round and bearing-mounted, roller skating is a kind of project and pulley is a kind of mechanical movement. Don't mistake roller skating for pulley in your future life.

speed roller skating

Speed skating is a periodic endurance racing sport, which is divided into traditional speed skating (four-wheel skating) and competitive speed skating (inline skating) internationally. Ultra-long distance and long distance are the basic events of speed skating, and short distance is the core event. Therefore, grasping the guiding ideology of two (long and short) intermediate events in training can effectively improve the training rate of athletes and improve the overall strength of the team and even the country. In the training of excellent speed skaters, we should follow the principle of mixing aerobic metabolism and anaerobic metabolism, and combine the differences in the demand ratio of aerobic metabolism and anaerobic metabolism in different events to carry out targeted physical special function training. Speed skating (referred to as speed skating) is a kind of roller skating competition similar to speed skating, which is divided into field race, road race and marathon.