Tensiomyography (TMG) is a non-invasivetechnique commonly used for evaluating muscle properties in highly trainedathletes. The aim of our study was to evaluate the mechanical characteristicsof m. triceps surae in competitive runners through TMG measurementand analyze if there was a relationship with running economy (RE). Nine malerunners completed the study (mean±SD: age 40.4±9.0 years, body height 176.2±4.9cm, body mass 70.7±9.4 kg, 10-km time 39.8±5.9 min, VO2peak 56.9 ±6.5 mL kg- 1min-1 ).Each subject visited the lab on two occasions with 72h of rest between the trials.On the first day, an incremental test was performed to determine theirventilatory thresholds and peak oxygen consumption. On the second day, RE wasevaluated on a treadmill at the velocity of their first ventilatory threshold(VT1), and mechanical characteristics of the soleus and gastrocnemius muscleswere analyzed with TMG. Significant differences were found between the economicand non-economic runners in m. soleus in delayed time (Td), contractiontime (Tc), and maximal radial displacement of the muscle belly (Dm). Also,significant differences were found in contraction time (Tc) in medium calf (MC)and in half relaxation time (Tr) in lateral twin (LT). The main finding of ourstudy was that the runners with better RE showed greater stiffness in thetriceps surae muscles, an aspect that seems to be associated with betterperformance in athlete runners.

中文翻译：

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肌张力图评估跑步经济性与小腿三头肌力学特性的关系

肌张力描记术 (TMG) 是一种非侵入性技术，常用于评估训练有素的运动员的肌肉特性。我们研究的目的是评估 m 的机械特性。通过TMG测量并分析与跑步经济性（RE）是否相关的竞技跑步者大三头肌。9 名男性跑者完成了研究（平均值±标准差：年龄 40.4±9.0 岁，身高 176.2±4.9cm，体重 70.7±9.4 kg，10 公里时间 39.8±5.9 min，VO2peak 56.9 ±6.5 mL kg-1min-1） . 每个受试者两次访问实验室，两次试验之间休息 72 小时。在第一天，进行增量测试以确定他们的通气阈值和峰值耗氧量。第二天，在跑步机上以第一通气阈值 (VT1) 的速度评估 RE，用TMG分析比目鱼肌和腓肠肌的力学特性。在 m 中发现经济和非经济跑步者之间存在显着差异。比目鱼肌延迟时间 (Td)、收缩时间 (Tc) 和肌腹最大径向位移 (Dm)。此外，中型小腿 (MC) 的收缩时间 (Tc) 和侧双胎 (LT) 的半张弛时间 (Tr) 也存在显着差异。我们研究的主要发现是，具有更好 RE 的跑步者在小腿三头肌中表现出更大的僵硬，这似乎与运动员跑步者的更好表现有关。和肌肉腹部的最大径向位移（Dm）。此外，中型小腿 (MC) 的收缩时间 (Tc) 和侧双胎 (LT) 的半张弛时间 (Tr) 也存在显着差异。我们研究的主要发现是，具有更好 RE 的跑步者在小腿三头肌中表现出更大的僵硬，这似乎与运动员跑步者的更好表现有关。和肌肉腹部的最大径向位移（Dm）。此外，中型小腿 (MC) 的收缩时间 (Tc) 和侧双胎 (LT) 的半张弛时间 (Tr) 也存在显着差异。我们研究的主要发现是，具有更好 RE 的跑步者在小腿三头肌中表现出更大的僵硬，这似乎与运动员跑步者的更好表现有关。