I think the facilities in the gym are dirty. First of all, the gym is a relatively closed space, and the air is not circulating, which means that bacteria can't spread out of the air medium, and fresh and clean air outside can't enter. Second, the gym is a public facility, and the public facilities of the gym cannot be effectively and systematically inspected. Moreover, many gyms do not have certain hygiene standards, and the state has no corresponding laws and regulations to restrict these industry rules. These public facilities in the gym are not deliberately cleaned, and there will be a certain damage rate after cleaning, which will reduce the utilization rate of equipment. Thirdly, due to the large flow of people in the gym, when people exercise, sweat stains, saliva and body fluids evaporate, leaving residues on the gym equipment. The temperature in the gym is relatively constant, and if there is too much water vapor, bacteria will multiply and parasitize. Over time, people's skin or hair will form small patches, which will cause skin allergies, so the equipment in the gym is very dirty. Fourthly, due to the illumination of the gym, ultraviolet rays can't directly kill bacteria on the surface of bacteria, so with the passage of time, bacteria and viruses will multiply rapidly in the corners of the gym. After the gym equipment comes into contact with the bacteria in these corners, there will be bacteria on the equipment, and people's hands will be contaminated with bacteria when grabbing these fitness facilities, so the spread of bacteria in the gym is very efficient and harmful to the human body. Fifth, in the gym, the most important reason is that people wear exposed clothes, and their exposed skin is infected with bacteria and viruses in the air, so they can take them home and breed at home. So the gym is a very big medium to spread bacteria and viruses. Therefore, I suggest that you choose to exercise at home as much as possible, clean regularly, set up fitness facilities, and don't go to gyms and other places with public facilities. If you have to go to a public gym, please clean your body before you exercise to avoid carrying bacteria to the gym outside, and you must clean your body before you go home after the gym is completed to avoid carrying bacteria and viruses from the gym to your home. Personal advice is to buy some fitness equipment to exercise at home, so that you can clean your skin in time, and you don't need to check the integrity of fitness equipment regularly. Because of the wear and tear of fitness equipment, personal use is still relatively low, so it is recommended to buy fitness equipment at home to avoid the breeding and spread of bacteria and viruses as effectively as possible.