Exercise induced muscle damage (EIMD) impairs maximal torque production which can cause a decline in athletic performance and/or mobility. EIMD is commonly assessed by using maximal voluntary contraction (MVC), creatine kinase (CK) and muscle soreness. We propose as an additional technique, tensiomyography (TMG), recently introduced to measure mechanical and muscle contractile characteristics. The purpose of this study was to determine the validity of TMG in detecting changes in maximal torque following EIMD. Nineteen participants performed eccentric elbow flexions to achieve EIMD on the non- dominant arm and used the dominant elbow flexor as a control. TMG parameters, MVC and rate of torque development (RTD) were measured prior to EIMD and repeated for another six consecutive days. Creatine kinase, muscle soreness and limb girth were also measured during this period. Twenty four hours after inducing EIMD, MVC torque, RTD and TMG maximal displacement had significantly (p<0.01) declined by 37%, 44% and 31%, respectively. By day 6 MVC, RTD and TMG recovered to 12%, 24% and 17% of respective pre-EIMD values. In conclusion, as hypothesised TMG maximal displacement significantly followed other standard EIMD responses. This could therefore be useful in detecting muscle damage from impaired muscle function and its recovery following EIMD.

译文

:运动引起的肌肉损伤(EIMD)会损害最大扭矩产生,这可能会导致运动成绩和/或活动能力下降。 EIMD通常通过使用最大自愿收缩(MVC),肌酸激酶(CK)和肌肉酸痛来评估。我们提议作为一项新技术,最近引入张力描记术(TMG)来测量机械和肌肉的收缩特性。这项研究的目的是确定TMG在EIMD后检测最大扭矩变化中的有效性。 19名参与者进行了偏心肘屈肌以在非优势臂上获得EIMD,并使用优势肘屈肌作为对照。在EIMD之前先测量TMG参数,MVC和扭矩产生率(RTD),然后连续六天重复测量。在此期间还测量了肌酸激酶,肌肉酸痛和肢体围长。诱导EIMD后二十四小时,MVC扭矩,RTD和TMG最大位移分别显着(p <0.01)分别下降了37%,44%和31%。到第6天,MVC,RTD和TMG分别恢复到各自的EIMD前值的12%,24%和17%。总之,由于假设的TMG最大位移明显遵循其他标准EIMD响应。因此,这对于检测由肌肉功能受损引起的肌肉损伤及其在EIMD后的恢复可能很有用。

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