# Progress in Ski Jumping Technology Based on Biomechanical Sport Research Methods
## 4 Conclusions  
Based on the literature research and the analysis of research methods such as motion video capture analysis, force plates, wearable inertial measurements, sensor equipment, surface EMG measurements, wind tunnel measurements, and computer simulation calculations, the technical requirements and research progress of ski jumping are summarized as follows:  
1. A high level of sports performance is attributed to the ski jumper's tuning of their overall flight system at each stage of the exercise sequence, and a change in one parameter will affect other parameters. Under computational fluid dynamics, research methods using wearable inertial measurement units and global navigation satellite system (GNSS) receivers will become essential for future ski jumping research.
2. Ski jumping requires solid technical stability, and the timing of the center-of-gravity movement when the athlete takes off is crucial. In theory, the factors that affect the flight distance of athletes are the ratio of lift and the resistance of the \"man-board\" system during the flight process; air density, windward area, and flight speed jointly affect the lift and resistance during the flight process; and the factors that determine the lift-drag ratio coefficient are the body attitude and the material of the ski suit. In the flight stage, the angle between the ankle and cervical verteb connects to the horizontal line, and the flight angle of attack can lead to an excellent aerodynamic drag reduction effect.
3. Ski jumping research, influenced by long distances, is mostly conducted in laboratory settings, including take-off force tests and computer simulations of air flight drag reduction technology. Motion video capture analysis can be applied to training and competition analysis, but a motion video capture analysis system covering the complete motion process needs to be developed. AI image processing systems can realize the three-dimensional posture reconstruction of athletes, which can be used as a supplement to sports technology analysis. Wind tunnels can be used to carry out drag reduction technology optimization training and strength and technical testing, the most widely used training research methods for athletes. The development of wind tunnel venues with comprehensive performance and intelligence has broad application prospects for athletes to correct technical posture and adapt to the environment. Wearable inertial measurement units have a wide test range and can cover the complete motion process. Their test content covers kinematics and dynamics data, making them a test method with high feasibility and reliability for training and monitoring ski jumping. With higher accuracy and a more stable transmission speed, compact and portable wearable inertial measurement and sensor equipment will be the primary methods for future research on ski jumping.  
Writing--original draft preparation, Y.L. and L.L.; writing--editing, L.X.; literature collection, J.C.; topic design and writing review, D.S. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the key R&D plan of China for Winter Olympics (Ministry of Science and Technology of the People's Republic of China, Grant No. 2020 YFF0304605-3).  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.  
**Data Availability Statement:** Data are contained within the article.  
**Conflicts of Interest:** The authors declare no conflicts of interest.