Establishment and application of paravertebral muscle
endurance and left-right symmetry measurement indexes and methods in teenagers

doi:10.3969/j.issn.2095-4344.2582

Abstract

Abstract:

BACKGROUND: Surface electromyography has indicated that non-specific chronic low back pain patients have inconsistent changes in the motion of erector spinae muscles on both sides of the lumbar spine. Existing physical fitness evaluation focuses on the evaluation of the overall strength of the waist, whereas there is no report on the evaluation methods and indicators of paravertebral muscle in teenagers.

OBJECTIVE: To establish methods and indicators for assessing teenagers’ paravertebral muscle endurance and left-right symmetry, and to preliminarily formulate evaluation criteria.

METHODS: Two hundred students, aged 13-18 years, were randomly selected in a middle school of Beijing, half male and half female. There were 100 junior high school students and 100 high school students. All the subjects did Biering-Sorensen (B-S) exercise to maintain isometric contraction of paravertebral muscles, and surface electromyography was then used to record the electromyography of bilateral erector spine muscles (ES) of L₃-L₄ and multifidus muscles (MF) of L₅-S₁. Measurement was terminated when the upper body could not maintain the horizontal posture or was still below the horizontal position after three reminders. The indexes were screened and the evaluation indexes were established. The evaluation criteria of paravertebral muscle endurance and left-right symmetry of each age group were determined by the dispersion method. The study protocol was in line with the ethics requirements of Beijing Sport University. Subjects and their guardians were fully informed of the study process.

RESULTS AND CONCLUSION: According to the anatomic posture analysis and muscle mobilization ratio test, the left/right erector spine muscle (LES/RES) and left/right multifidus muscle (LWF/RMF) in B-S action were confirmed to be the prime muscle. Mean power frequency (MPF) decreased linearly with time, and the correlation coefficient was R < -0.97 (P < 0.01). In terms of repeatability measurement, MPF slope (slopeMPF) difference test was defined as P > 0.05, and correlation coefficient within the group was ICC > 0.80 (P < 0.01), indicating a good repeatability. Fitting composite index, the index v=slopeMPF (LES+RES+LMF+RMF)/4 was used to evaluate teenagers’ paravertebral muscular endurance, and u=slopeMPF (LES-RES)/slopeMPF (LES+RES)+slopeMPF (LMF-RMF)/slopeMPF (LMF+RMF) was to evaluate the left-right symmetry. The evaluation results revealed that the paravertebral muscle endurance of high school students of the same sex was increased in relative to junior high school students (P < 0.01). There were significant differences in paravertebral muscle endurance between male and female students in high school. The teenagers’ paravertebral muscle endurance and symmetry showed normal distribution, and could be graded by deviation method. In this study, the indexes and methods for evaluating paravertebral muscle endurance and left-right symmetry were preliminarily established, and the criteria for evaluating juvenile paravertebral muscle endurance and left-right symmetry were preliminarily established by deviation method.

Key words: teenagers, paravertebral muscle, endurance, symmetry

CLC Number:

Qiu Dan, He Hui, Xiong Kaiyu, Li Hongjuan. Establishment and application of paravertebral muscle endurance and left-right symmetry measurement indexes and methods in teenagers[J]. Chinese Journal of Tissue Engineering Research, 2020, 24(14): 2197-2204.

Figures/Tables 15

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