The performance of Chinese women's badminton singles players is declining to a large extent, the training of badminton in China needs to catch up, and the talent ladder has caused a fault. Badminton Routine training, the effect is not apparent . An essay on the impact of core training on athletes' skill performance was written by Luo; it proves that core strength training plays a positive role in a variety of sports; there is no study of female badminton players. Coaches or sports researchers can use this knowledge to manage the training load of badminton players better, thereby helping badminton players achieve better results in badminton training and competition.

Hibbs constructed the Model of Core Training and Potential Performance according to the theoretical framework of core strength training. This study intervention design part of the researchers referred to Greg Glassman's "CrossFit training guide" and theoretical framework of core strength training. Motion design source form Motion design source "Diversified Training to Enhance Core Strength State General Administration of sport (Sport.gov.cn)"and Khatoon wrote the article. The duration and frequency of intervention came from the review. It is found in reviewing the effect of core strength training on badminton players' performance is 8 weeks and 3 times. Therefore, this study adopted intervention for 8 weeks, 3 times a week. The subjects of this study are 18-22 years old female college elite badminton players, all of whom are national second-level and above athletes. This study employs a Cluster Randomized Controlled Trial (CRCT) design. The athletes were randomly assigned to two training sites and divided into experimental and control groups. The two groups had the same professional skills training content. The only difference was the physical training part. The training program of the two groups lasts 8 weeks, 3 times per week, and 1 hour per training. The experimental group performed core training, while the control group maintained routine training. In addition, the specific content of the routine training of the control group was the standard training plan of the school. The dependent variables measured in this study are physical fitness (strength, speed, endurance, agility, and flexibility) and killing the ball under different states, including in sit Smash, jump smash, move left smash, move right smash, and back smash.

Inclusion Criteria:

1. Aged 18-22 years.
2. Chinese university female badminton players.
3. No sports injuries, such as ankle injuries or waist injuries.
4. Elite athlete

Exclusion Criteria:

1. Athletes who were systematically training their core strength.
2. Athletes with sports injuries such as ankle or waist injuries.
3. Who could not follow the entire training schedule for three months.
4. Students who work out regularly or have hobbies for extra physical exercise.
5. Students with physical or mental illness.

Their information may need to be kept confidential