摘要
背景:力量素质是人类进行身体活动的必备要素,短暂的低频脉冲磁场刺激可诱导和激活经典瞬时感受器电位通道1(classical transient receptor potential channel 1,TRPC1),并引发小鼠骨骼肌生长与重塑,从而对肌组织产生一系列生理支持效应,该机制是否会引发人体骨骼肌生理结构与工作能力的变化,并作为一种全新的人体肌力提升手段尚无研究。目的:选用可激活TRPC 1的特定低频脉冲磁场作为外源性刺激,以观察并验证短期刺激对人体肱二头肌最大自主收缩力与力量耐力的影响。方法:选择普通成年健康受试者27例,随机分为训练组、照射组、训练+照射组,每组9例。训练组采用抗阻训练,训练+照射组每次接受10 min低频脉冲磁场刺激(强度1.5 mT,频率3300 Hz)后即刻进行抗阻训练,照射组只进行10 min低频脉冲磁场刺激,试验周期9 d,间隔48 h进行1次训练或照射,为了观察低频脉冲磁场与抗阻训练结合是否会产生增益效果,训练组与训练+照射组在5次训练前后采集最大自主收缩力的肌电信息,照射组只在第1,3,5次进行最大自主收缩力测试,跟踪肌力变化情况。试验后观察3组受试最大自主收缩力值、1次重复最大力量、耐力持续时间、中值频率的变化。结果与结论:①在试验过程中,所有被试的最大自主收缩力值变化与时间交互效应显著(P<0.01),随时间的推进均出现显著变化,各组内最大自主收缩力值变化与时间交互显著(P<0.05),组间无交互效应;②各组被试后测最大自主收缩力值、1次重复最大力量、耐力持续时间、中值频率相比前测均显著提升,其中训练组各指标提升率依次为19%,23%,28%,18%,训练+照射组提升率依次为11%,10%,53%,18%,照射组各指标提升率依次为28%,18%,27%,6%;③训练+照射组的中值频率显著高于照射组(P<0.05),与训练组无显著性差异;④通过对训练组与训练+照射组每次训练前后的最�
BACKGROUND:Strength quality is an essential element for human physical activity.Short-term low-frequency pulsed electrical magnetic field(PEMF)stimulation can activate classical transient receptor potential channel 1(TRPC1)and trigger skeletal muscle growth and remodeling in mice,thereby producing a series of physiological support effects on muscle tissue.However,there is no report on whether this mechanism will alter the physiological structure and working ability of human skeletal muscle and act as a new way to improve muscle strength.OBJECTIVE:To select a specific low-frequency PEMF that can activate TRPC1 as an exogenous stimulus to observe and verify the effect of short-term stimulation on the maximum voluntary contraction force and strength endurance of human biceps brachii.METHODS:A total of 27 normal adult healthy subjects were selected and randomly divided into exercise group,PEMF group,and exercise+PEMF group,with 9 cases in each group.The training group was subjected to resistance training.The exercise+PEMF group received 10-min low-frequency PEMF stimulation(intensity 1.5 mT,frequency 3300 Hz)immediately after resistance training.The irradiation group only received 10-minute low-frequency PEMF stimulation.Training or irradiation was performed every 48 hours for 9 days.Electromyography information on the maximum voluntary contraction force was collected before and after five training sessions in the exercise group and the exercise+PEMF group,to observe whether the combination of low-frequency PEMF and resistance training will produce a gain effect.In the PEMF group,the maximum voluntary contraction force was tested only at the 1st,3rd,and 5th sessions to track the changes in muscle strength.The maximum voluntary contraction force,one-repetition maximum force,endurance duration and median frequency were observed in each group.RESULTS AND CONCLUSION:(1)During the trial,there were significant interaction effects between the changes in maximum voluntary contraction force and time in all the subjects(P<0.01
作者
厉中山
王春露
刘洁
杨铁黎
孔维签
李伟
张秦阳
陈松
车同同
李志远
关荣鑫
白石
Li Zhongshan;Wang Chunlu;Liu Jie;Yang Tieli;Kong Weiqian;Li Wei;Zhang Qinyang;Chen Song;Che Tongtong;Li Zhiyuan;Guan Rongxin;Bai Shi(Department of Physical Education,Northeastern University,Shenyang 110819,Liaoning Province,China;School of Sports Science,Fujian Normal University,Fuzhou 350117,Fujian Province,China;Beijing School of Ice and Snow Sports,Beijing Sport University,Beijing 100084,China;Scientific Research Center of China Medical University,Shenyang 110122,Liaoning Province,China;Capital University of Physical Education And Sports,Beijing 100191,China;School of Information Science and Engineering,Shenyang University of Technology,Shenyang 111003,Liaoning Province,China;Department of Sports,Tsinghua University,Beijing 100084,China;Department of Sports,Zhejiang University,Hangzhou 310058,Zhejiang Province,China;Liaoning Provincial Magnetic Detection and Treatment Innovation Center,Shenyang 110034,Liaoning Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2023年第11期1796-1804,共9页
Chinese Journal of Tissue Engineering Research
基金
国家自然科学基金青年项目(62001313),项目负责人:白石
中国大学生体育协会一般项目(L202103003),项目负责人:厉中山。
关键词
脉冲磁场
经典瞬时感受器电位通道1
TRPC1
力量素质
短期效应
耐力
肱二头肌
收缩
肌力
pulsed electrical magnetic field
classical transient receptor potential channel 1
TRPC1
strength quality
short-term effect
endurance
biceps
contraction
muscle strength
