Magnetic calcium-regulated mitochondrial sensitivity in adolescents: assessment of skeletal muscle function and body composition

doi:10.12307/2026.279

Abstract

Abstract: BACKGROUND: Magnetic mitochondrial calcium regulation technology, as a non-invasive method for promoting skeletal muscle function, has been effectively demonstrated in improving muscle function and enhancing metabolic sensitivity. Existing studies have shown that this technology has significant physiological promoting effects on adults, the elderly, and postoperative rehabilitation groups. However, its intervention effect on skeletal muscle function and body composition in 12-13-year-old adolescents remains unclear.
OBJECTIVE: To explore the sensitivity of skeletal muscle function and body composition in 12-13-year-old adolescents to magnetic stimulation by assessing their skeletal muscle function and body composition.
METHODS: Thirty-four junior high school students in Grade 7 from Liaoning Province Experimental School were recruited and randomly divided into a control group and a trial group. The control group maintained their daily school activities without any specific physical training plan. In addition, the trial group received low-frequency pulsed magnetic field intervention twice a week (stimulation duration 10 minutes, magnetic field strength 1.5 mT, frequency 3 300 Hz, intervention once every 72 hours) for four consecutive weeks. Changes in maximum strength, explosive power, endurance, and body composition-related indicators at the intervention sites were observed before the start of the trial (pre-test) and after the end of the trial (post-test).
RESULTS AND CONCLUSION: (1) After 8 sessions of low-frequency pulsed magnetic field stimulation over 4 weeks, the subjects showed significant improvements in explosive power, aerobic endurance, isometric endurance, and body composition-related indicators, indicating that 12-13-year-old adolescents had good sensitivity to magnetic calcium regulation stimulation for the aforementioned skeletal muscle function and body composition. (2) The effect on maximum strength improvement was not significant, and their muscle magnetic sensitivity was lower than that of adults, but they showed some advantages in maintaining maximum strength under prolonged sedentary conditions. These results suggest that magnetic mitochondrial calcium regulation technology, as a novel passive and non-invasive skeletal muscle function enhancement technique, could be explored as a novel intervention to improve the physical health of adolescents.

Key words: adolescent physique, muscle strength, body composition, magnetic stimulation, TRPC 1, sensitive period for physical fitness, muscle secretion group

CLC Number:

Li Zhongshan, Li Wenhao, Du Xinran, Yang Tieli, Bai Shi. Magnetic calcium-regulated mitochondrial sensitivity in adolescents: assessment of skeletal muscle function and body composition[J]. Chinese Journal of Tissue Engineering Research, 2026, 30(25): 6496-6505.

Figures/Tables 5

左腿最大自主收缩力(P=0.013，d=0.733)、折返跑(P=0.004，d=1.020)试验后测数据相比试验前测呈现显著性增长，左臂最大自主收缩力、右臂最大自主收缩力以及右腿最大自主收缩力试验后测与试验前测数据无显著性差异。爆发力指标中，纵跳摸高(P=0.050，d=0.555)试验后测数据相比试验前测数据呈现显著性增长，立定跳远试验后测与前测数据无显著性差异。耐力指标中，莱格尔跑(P=0.012，d=0.741)试验后测数据相比前测数据出现显著性增长，中值频率与耐力时间试验后测与前测数据无显著性差异，见表2。 2.4.2 试验组骨骼肌功能各分类数据指标分析采集试验组试验前测与后测数据各分类指标，观察发现右腿最大自主收缩力(P=0.008，d=0.833)试验后测数据相比前测数据出现显著性增长，左臂最大自主收缩力、右臂最大自主收缩力、左腿最大自主收缩力试验后测与试验前测数据均无显著性差异。爆发力指标中，折返跑(P=0.046，d=0.565)与立定跳远(P=0.038，d=0.592)试验后测数据相比试验前测数据呈现显著性增长，纵跳摸高试验后测与前测数据无显著性差异。耐力指标中，莱格尔跑(P=0.034，d=0.608)，中值频率(P=0.023，d=0.689)，耐力时间(P=0.0291，d=0.629)试验后测数据相比前测数据出现显著性增长，见表3。 2.4.3 两组组间身体功能各指标提升率独立样本t检验分析结果通过试验组与对照组大腿各肌群变化率对比发现，试验组的左腿MVC(P=0.005，d=1.123)、右腿MVC(P=0.015，d=0.943)、纵跳摸高(P=0.022，d=0.887)、立定跳远(P=0.014，d=0.957)、莱格尔跑(P=0.017，d=0.923)、中值频率(P=0.003，d=1.177)、耐力时间(P=0.022，d=1.029)提升率显著高于对照组，见图4。 2.5 身体成分各分类评估数据指标分析 2.5.1 对照组数据指标分析采集对照组试验前测与后测数据各分类指标观察发现，在各分类数据指标中，右臂脂肪率(P=0.021，d=0.674)与躯干脂肪率(P=0.008，d=0.795)试验后测数据相比试验前测数据呈现显著性增长，肌肉率(P=0.033，d=0.610)试验后测数据相比试验前测数据呈现显著性降低，体质量、骨骼肌质量、去脂体质量、皮下脂肪量、左腿脂肪率、右腿脂肪率、左臂脂肪率、体质量指数、脂肪率、基础代谢量、皮下脂肪率试验后测与前测数据无显著性差异，见表4。"

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