Smart sport and big data have become inextricably linked with new technologies and devices to monitor sport-related information in real time. In this paper, a lightweight, portable and self-powered triboelectric nanogenerator (LPS-TENG) has been developed to monitor the frequency and force of skaters’ pedaling. Friction layers are formed of polytetrafluoroethylene (PTFE) and nylon films. Based on the triboelectric effect, LPS-TENG does not require an external power supply, and it can be used to monitor biomechanical motion independently. Under the conditions of 1 Hz and 17.19 N, the outputting voltage of LPS-TENG is stabilized at 14 V. Wireless data transmission is achieved with the help of the LPS-TENG and AD module. Visual feedback is provided by the upper computer system in the process of processing data. The wireless intelligent motion correction system is composed of an LPS-TENG, an AD module and a back-end computer. It can clearly analyze the changes between different frequencies and forces during skating. Results showed that the signal of tester’s high-frequency and great-force motion, was transmitted to the computer, and its feedback was given after analysis and processing successfully. The system may help coaches develop training methods, means and tactics to increase athletes’ performance and competitive level in athletic sport. The purpose of this study is to provide new ideas for monitoring skaters’ sport techniques, promote the use of force sensors in the monitoring of sport and develop intelligent assistant training systems.

Background: Adolescent mental health has become a major global concern. Subjective wellbeing, as a core indicator of mental health, requires exploration of its intervention pathways. Participation in sports, encompassing physical regulation, emotional release, and social interaction, is considered an important avenue to promote subjective wellbeing; however, its specific mechanisms remain unclear. Objective: This study aims to explore the relationships among sports participation, social support, basic psychological needs, and subjective wellbeing, providing a theoretical basis for enhancing adolescents’ subjective wellbeing. Methods: A survey was conducted among 1,000 adolescents from Shandong, Henan, Jilin, Guangdong, Shaanxi, and Liaoning using scales measuring sports participation, social support, basic psychological needs, and subjective wellbeing. Results: Sports participation significantly and positively predicted both social support and basic psychological needs. Social support and basic psychological needs served as partial mediators in the relationship between sports participation and adolescents’ subjective wellbeing, with a significant chain mediation effect observed. Conclusion: The chain mediation pathway of social support and basic psychological needs indicates that sports participation enhances adolescents’ subjective wellbeing by creating a supportive social environment, which satisfies basic psychological needs. Furthermore, moderate levels of physical activity were associated with the subjective wellbeing, suggesting that only appropriately dosed exercise effectively promotes individual wellbeing, while insufficient or excessive exercise may diminish the impact of sports participation on subjective wellbeing.