In a narrow sense, polymer composites refer to multiphase materials composed of polymers and other substances with different compositions, shapes, and properties. They can be divided into structural composites and functional composites. In a broad sense, polymer composite materials also include polymer blend systems, collectively referred to as “polymer alloys.” The purpose of this paper is at studying how to study the impact of polymer composite materials on the adaptation and comfort of sports and fitness facilities. This paper puts forward the problem of comfort, which is based on the construction materials of sports equipment, and then elaborates on the polymer composite materials and makes a case design and analysis of the applicability of polymer composite materials in sports equipment being carried out. The experimental results show that 34.81% of the people are very satisfied and relatively satisfied with the quality identification of sports equipment and only 41.99% of the people are very satisfied and relatively satisfied with the feeling of sports equipment when exercising. Both are less than half of the total sample size, which shows that the current state of sports facilities is worrying.

The physical health of adolescents is directly related to the rise and fall of the country, the hope of the nation, and their own healthy growth. It is a focal issue that the country, society, schools, and families have always paid close attention to. Based on big data, this paper explores the intelligent service system of youth health and national traditional sports. The national traditional sports culture is based on the national traditional sports as the carrier to reflect the sum of the educational wisdom and sports connection and practical ability of all ethnic groups. This article first introduces health big data and the traditional sports culture of the nation. And a health status evaluation model based on multivariate Gaussian distribution is proposed, which adopts Gaussian distribution theory. Based on the multivariate Gaussian distribution model, the probability distribution of physiological big data features is calculated, and then according to the probability of feature points. It constructs a health status assessment model by dividing characteristic probability intervals. Finally, the influence of traditional sports on the physical and mental health of college students is analyzed and studied. The experimental results show that college students must insist on traditional sports more than 2 times a week, preferably no less than 1 hour a day, which has a significant effect on improving the mental health of college students.

As a treasure left over from Chinese traditional culture, martial arts have a long history and lasts for a long time. With the country’s promotion and support of martial arts culture, martial arts have also attracted more and more people’s attention. In order to carry forward the martial arts culture, the combination of martial arts and sports has formed a set of martial arts sports suitable for today’s students, such as martial arts aerobics. It is used as a class exercise for students, and basically, every student in the school has learned it and practiced it often. However, with the development of the times, it is difficult for today’s students to arouse students’ enthusiasm for martial arts sports for traditional martial arts sports. Artificial intelligence technology and virtual reality, as products of today’s digital age, attract the attention and use of students with their unique features. This also means that the reform of martial arts sports based on artificial intelligence and virtual reality technology is imperative in order to make more students regain their enthusiasm for martial arts sports. However, the specific impact of artificial intelligence and virtual reality on the physical and mental development of students in martial arts sports is a problem to be confirmed by research. Through in-depth research on artificial intelligence and virtual reality technology, this paper shows that artificial intelligence and virtual reality martial arts sports can increase the lung capacity of boys by about 14% and girls by 16%; the effect on physical fitness can increase the lower body strength of boys by 3% and the flexibility of girls by 30%; as for the impact on mental health, it can be concluded that the emotional and cognitive dimensions of boys and girls have increased by about 19% compared with the previous values.