Objective: This study aimed to investigate the effect of a two-week machine massage on the physical properties of the erector spinae and serum biochemical indexes of adolescent athletes after training.Methods: Sixteen male adolescent wrestlers were recruited (age: 15 ± 1 year; height: 166 ± 7 cm; weight: 56 ± 7 kg) and randomly assigned to machine massage (MA, 8) and control (CO, 8) groups. Participants in the MA group received machine massage for 20 min after each wrestling training from Monday to Saturday (except on Thursday) for two weeks, while the participants in the CO group recovered naturally. Over the course of two weeks, all the participants underwent similar wrestling training program under the guidance of a professional coach. Before and after the intervention, serum urea and creatine kinase (CK) levels were measured in a fasting state. A Myoton Pro digital muscle evaluation system was used to measure the physical properties of the erector spinae, including the oscillation frequency, logarithmic decrement of a muscle’s natural oscillation, and dynamic stiffness.Results: After two weeks of machine massage treatment, the dynamic stiffness of the erector spinae in the MA group decreased by 12.90% and that in the CO group increased by 2.34%, indicating a significant difference between the two groups (p = 0.04, ƞ2 = 0.286). The decrease in the logarithmic decrement of a muscle’s natural oscillation value in the MA was significantly greater than that in the CO (p = 0.003, ƞ2 = 0.286). Moreover, the serum CK values decreased by 33.84% in the MA group and by 1.49% in the CO group, despite a trend of change between the groups (p = 0.062, ƞ2 = 0.084). No significant difference was found in the improvement in serum urea levels between the two groups after two weeks of treatment.Conclusion: Results of the present study indicated that a two-week machine massage had a positive effect on the improvement of the physical properties of the erector spinae of wrestlers during training.

Introduction: Strength training plays a unique role in improving muscle strength and stability in athletes. Initially used in rehabilitation, it is now widely used in competitive sports. Objective: To combat the problem of physical exercise capacity and body posture maintenance when tennis players complete several complex movements in training, this article reviews the research on strength training in various countries from the core concept. Methods: Based on the main bones, joints, and muscle groups in the core area, the kinematic characteristics, and the physiological mechanism of these muscle groups, the research model of applying strength training in teaching tennis was established. The application of state-of-the-art computer technology in strength training can be based on data feedback from athletes and their training in tennis training. It can be used for real-time or faster data processing and analysis: data processing is closer to the data source than in an external data center or done in the cloud to reduce lag time. Results: Based on the data, we can carry out the corresponding training plans to help the athletes win the championship. With the methods of literature review, experiment, and comparative analysis, this paper studies the influence of strength training on body shape characteristics, the impact of strength training on technical accuracy characteristics, and the effect of strength training on physical health indicators. Conclusion: The results show that the accuracy of the experimental data is improved by 20%, and the authenticity of the data is more robust, thus of practical value. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.