The average score of the 886 players participants was (10.8 ± 2.3) points, (10.0 ± 2.0) points in the psychotropic drug group and (11.3±2.4) points in the narcotic drug group. There was a significant difference between the narcotic drug group and the psychotropic drug group (P < 0.01). This isThe results are similar to the research results ofthose reported by Liu Zhaoqiang et al.et al, but the score is much lower than that of Liu Zhaoqiang et al. On the one hand, it this may be related due to the small limited sample size of the test subjects, and on the other hand, or it may be related to the group classification group, so it is difficult tomaking the comparison ofe the test results inaccurate . In addition, foreign studies also pointed out that the test scores of healthy people ranged from (14.14±2.85) to (15.7±1.9), indicating that the score of the general population was higher than the total score of "14", which got scoring 2 points in each of the seven tests on average . ThereAt present, there are few large-sample studies on scores of large sample ofinvolving the drug abuse population at home and abroad. Therefore, the results of this study cannot be compared across the boarddirectly. However, it can be confirmedthis study confirms that compared with the general population, the physical function of drug abusers is generally poorer, which is similar toin accordance with the study of Li Zhang et al. .
There were also significant differences between The psychotropic drugs group scored significantly lower than and the narcotic drugs group in five tests of mobility of lower limbs and trunk mobility (squat, trunk stability push-ups, hurdle step, straight lunge, and rotation stability) (P < 0.01), and the scores of psychotropic drugs group were lower than that of narcotic drugs group. It is known that Mmost patients with cerebral palsy have abnormal posture and severe movement disorders, because thedue to central nervous system damage. of patients with cerebral palsy is damaged, which leads to Tthe discoordination of the skeletal musculoskeletal system, nervous system and soft tissue, affects the spinal stabilization system and impacts core strength . In this study, the psychotropic drugs group scored significantly lower than the narcotic drugs group in the core stability items. The latter may be related to the greater damage of psychotropic drugs on the central nervous system, resulting in more pronounced core motor function damage.
Males scored higher than females in the push-up body stability item but lower in the other items. This may be related to the physiological structure of men , having a stronger trunk than women. According to societal and cultural standards, males often participate in more physically demanding activities than women, whereas women are more flexible than men. For example, in a sample of 44 women and 53 men, only 8 of 44 women (18%) scored 1 on the shoulder mobility test, but 26 of 53 men (49%) scored 1 on the shoulder mobility test. In contrast, no woman scored 0 on the active straight leg raising test, and only three women scored 1, while one man scored 0 and 15 men scored 1 on the active straight leg raising test. Men performed better in the push-up test, measuring upper body strength and stability, with 15 out of 53 men (28%) scoring a 3, while only 3 out of 44 women (7%) scored a 3 on the push-up test[25, 26] . The 30-34 age group scored lowest on all seven tests, and the 40-44 age group scored highest on most tests. Subjects aged 30-34 in the study had the lowest FMS scores compared with other age groups. This may be due to the larger population of people taking psychotropic drugs between 30 and 34 years old than the 34 - 44 age group. This phenomenon may be related to the relatively short history of psychotropic drugs in China and control by public security organizations .
Asymmetries in the FMS test were identified in 735 of the 886 study participants (83%). The high incidence of asymmetry may be related to the decline of strength and flexibility caused by the deterioration of body function following drug abuse. Studies have also proved that the leg strength of drug abusers is related to body balance. More than half of the subjects in this study demonstrated bilateral asymmetry in the FMS test, with the greatest asymmetry in shoulder range of motion (n=290). Inadequate or excessive shoulder movement affects the whole body movement chain , leading to labrum lesions and subacromial impingement , which may ultimately affect a person's ability to carry out daily activities . The next highest numbers associated with asymmetry were rotational stability and active straight leg raising, with 279 and 266 subjects showing asymmetry, respectively. Both tests are complex and require core stability, involving the strength and flexibility available to the respective joints. Core stability is the ability to stabilize the lumbar spine and pelvic region through the coordinated contraction of the trunk muscles . Damage to core strength may result from problems caused by the combined action of the spine, muscles or brain nerves . Damage to the core strength may affect spinal stability, thereby hindering the correct execution of functional movements, reducing motor performance, and affecting posture control and balance . The loss of core strength leads to asymmetry and functional limitation, potentially resulting in long-term dysfunction and disability . Therefore, early detection of motor asymmetry can reduce the likelihood of injury, long-term dysfunction and disability .
The total score of FMS was significantly correlated with gender (r=0.198, P < 0.01), age (r=0.161, P < 0.01) and drug type (r=0.283, P < 0.01). Gender, age and drug type were important predictors of the total FMS score (P < 0.01). Regression models revealed that gender, age, and drug type accounted for approximately 11.0% of the variability in total FMS scores. Multiple regression was used to explore the relationship between the FMS score and other variables. Age, type of drug use, and gender were significantly correlated with the FMS score, accounting for about 11% of the total score variance, while years of drug use were not. Although age, type of drug use and sex were associated with physical activity, these do not fully explain the variability in physical activity and its relationship with FMS, as other factors (such as motivation) may also be associated with physical activity. Additionally, the number of years of drug use serves as an objective criterion for evaluating the body's physical ability. It can only be assumed that the longer the duration of drug usage, the higher the physical damage, and the specific damage to the body must be explored further. On the other hand, FMS scores were more associated with balance, coordination, postural control, flexibility, and strength, which may be one important reason why years of drug use were not associated with FMS scores. To our knowledge, this is the first study to explore the relationship between total FMS score and gender, age, and type of drug use, confirming that gender, age, and type of drug use are predictors of the total FMS score model for the drug abuse population.
DEFICIENCIES AND ASSUMPTIONS
The scientific contribution of this study lies in its identification of deficiencies and comparisons in FMS among narcotic and psychotropic drug users. This study is an experimental observation with a strong objective evaluation. The types of drugs are classified according to the main types of smoking, which could impact this experimental study. A follow-up study can improve this aspect. In addition, the evaluation scale alone is not sufficient to predict functional motor disability. Factors such as the usual exercise habits, lifestyle and motivation for physical activity of people with substance abuse should also be considered. Subsequent experiments can be further verified by medical detection of FMS.
In addition, people who take drugs more than three times are sent to compulsory detoxification centers. Therefore, most people in compulsory detoxification centers are middle-aged people, so most of our subjects are between 30 and 44 years old. We hope there will be more comprehensive screening of age sample size in the follow-up study.