## 4 Discussion
Training programs run by sports clubs can therefore increase the stability and neuromuscular control of the hip, knee, ankle, and torso joints. Similar trends were observed in the studies by [PERSON] et al. [28] and [PERSON] et al. [29]. In our opinion, the squat, due to the complexity of the movement and its functionality, is an important element of the FMS assessment. The squat pattern gives us information on joint mobility, trunk stability and the alignment of the knee joints in motion, which are indirectly related to the mechanisms contributing to the increased risk of knee joint injuries [30]. Subsequent studies have also shown that FMS results can be improved with the right correction program [31]. The results of our research indicate that the test of arm bending in the front support (\"push-up\") was the weakest in the group of subjects and the control group. As [PERSON] writes [32], this test requires the strength of the upper limbs and the shoulder girdle and high stability of the torso. This test caused many difficulties in the study group and the control group. It is worth noting that the low result of this test significantly reduces the overall FMS score. Our third assumption was that the FMS result is related to the anterior stability of the knee joints in badminton players between the ages of 10 and 11. In the experimental group, there is a significant relationship between the stability index and the result in the FMS assessment. The significant fact is that this relationship is only observed in the experimental group. In our study, 39 people from the test group had a score of \(\leq\)14 points. The FMS assumes that a score of \(\leq\)14 increases the risk of injury [33]. During the period of our research, no injury was found in any competitor, there was no partial or complete damage to the ACL, which is related to the anterior instability of the knee joint. On the other hand, better anterior stability of the knee joints was observed in people who obtained more points in the FMS assessment. This is most likely related to better neuromuscular control in people who scored better on FMS. As the researchers write, FMS gives results that help to determine the asymmetries of the left side of the body to the right, disorders of the movement apparatus, such as mobility of peripheral joints or trunk stability, which are associated with an increased risk of injury. [PERSON] et al. write that FMS can be an effective tool for testing the stability and mobility level of children and adolescents aged 10-17 [34]. The FMS can provide a wealth of information on the physical fitness of young athletes. These studies also assessed the functional tasks of FMS and their impact on the athletic performance of 10-12-year-old tennis players. On the basis of 28 subjects, it was found that FMS is a good tool for showing the abnormalities of the movement apparatus in children. According to the researchers, thanks to the conclusions drawn from the FMS assessment, corrective exercises can be implemented to reduce the risk of injuries later in life [34]. Our research shows that there are no statistical differences in terms of the analyzed variables between boys and girls. The analysis of the relationship between height, body weight, and BMI also did not show any statistically significant relationships. Scientific evidence shows that women have a higher injury rate than men. Such variability is observed from an early age. There is research showing that muscle strength and muscle activation may pose a greater risk of injury in girls than in boys. As [PERSON] et al. write [18], the stability of the knee joint is not the same in different directions and planes of movement and may partially depend on the age of the respondents, body composition and weight, muscle strength and anatomical conditions of the lower limbs in women and men. [PERSON] et al. showed in their studies that greater valgus of the knee joints in women can be largely explained by the anatomical conditions of the hip joint [18].