Arampatzis Adamantios, Kharazi Mohamadreza, Theodorakis Christos, Mersmann Falk, Bohm Sebastian
Department of Training and Movement Sciences, Humboldt-Universität zu Berlin, Philippstr. 13, Haus 11, 10115 Berlin, Germany.
Berlin School of Movement Science, Humboldt-Universität zu Berlin, 10115 Berlin, Germany.
R Soc Open Sci. 2023 Aug 30;10(8):230007. doi: 10.1098/rsos.230007. eCollection 2023 Aug.
The objective of the study was to explore how biarticular mechanisms of the gastrocnemii muscles may provide an important energy source for power and work at the ankle joint with increasing running speed. Achilles tendon force was quantified as a proxy of the triceps surae muscle force and the contribution of the monoarticular soleus and the biarticular gastrocnemii to the mechanical power and work performed at the ankle joint was investigated in three running speeds (transition 2.0 m s, slow 2.5 m s, fast 3.5 m s). Although the contribution of the soleus was higher, biarticular mechanisms of the gastrocnemii accounted for a relevant part of the performed mechanical power and work at the ankle joint. There was an ankle-to-knee joint energy transfer in the first part of the stance phase and a knee-to-ankle joint energy transfer during push-off via the gastrocnemii muscles, which made up 16% of the total positive ankle joint work. The rate of knee-to-ankle joint energy transfer increased with speed, indicating a speed-related participation of biarticular mechanisms in running. This energy transfer via the gastrocnemii seems to occur with negligible energy absorption/production from the quadriceps vasti contractile elements and is rather an energy exchange between elastic structures.
本研究的目的是探讨腓肠肌的双关节机制如何随着跑步速度的增加为踝关节的功率和功提供重要的能量来源。将跟腱力量化为小腿三头肌肌力的替代指标，并在三种跑步速度（过渡速度2.0米/秒、慢速2.5米/秒、快速3.5米/秒）下研究单关节比目鱼肌和双关节腓肠肌对踝关节机械功率和功的贡献。尽管比目鱼肌的贡献更大，但腓肠肌的双关节机制在踝关节所做的机械功率和功中占了相当一部分。在站立期的第一部分存在从踝关节到膝关节的能量转移，在蹬地阶段通过腓肠肌存在从膝关节到踝关节的能量转移，这占踝关节总正功的16%。从膝关节到踝关节的能量转移速率随速度增加，表明双关节机制在跑步中与速度相关的参与。通过腓肠肌的这种能量转移似乎在股四头肌收缩元件的能量吸收/产生可忽略不计的情况下发生，并且更像是弹性结构之间的能量交换。
