Differences in Knee Extensors' Muscle-Tendon Unit Passive Stiffness, Architecture, and Force Production in Competitive Cyclists Versus Runners.

IF 1.1 4区医学 Q4 ENGINEERING, BIOMEDICAL Journal of Applied Biomechanics Pub Date : 2022-11-16 Print Date: 2022-12-01 DOI:10.1123/jab.2022-0072

Leonardo Cesanelli, Sigitas Kamandulis, Nerijus Eimantas, Danguole Satkunskiene

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Abstract

To describe the possible effects of chronic specific exercise training, the present study compared the anthropometric variables, muscle-tendon unit (MTU) architecture, passive stiffness, and force production capacity between a group of competitive cyclists and runners. Twenty-seven competitive male cyclists (n = 16) and runners (n = 11) participated. B-mode ultrasound evaluation of the vastus lateralis muscle and patellar tendon as well as passive stiffness of the knee extensors MTU were assessed. The athletes then performed a test of knee extensor maximal voluntary isometric contractions. Cyclists displayed greater thigh girths, vastus lateralis pennation angle and muscle thickness, patellar tendon cross-sectional area, and MTU passive stiffness than runners (P < .05). Knee extensor force production capacity also differed significantly, with cyclists showing greater values compared with runners (P < .05). Overall, the direct comparison of these 2 populations revealed specific differences in the MTU, conceivably related to the chronic requirements imposed through the training for the different disciplines.

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在竞技自行车运动员和跑步运动员中，膝关节伸肌-肌腱单元被动刚度、结构和力量产生的差异。

为了描述慢性特定运动训练可能产生的影响，本研究比较了一组竞技自行车运动员和跑步运动员之间的人体测量变量、肌肉肌腱单位(MTU)结构、被动刚度和力量生产能力。27名男性自行车运动员(n = 16)和跑步运动员(n = 11)参加了比赛。b超评估股外侧肌和髌骨肌腱以及膝关节伸肌MTU的被动僵硬度。然后，运动员进行了膝关节伸肌最大自主等距收缩测试。骑自行车者比跑步者表现出更大的大腿周长、股外侧角和肌肉厚度、髌骨肌腱横截面积和MTU被动刚度(P < 0.05)。膝关节伸肌力量生产能力也有显著差异，骑自行车者比跑步者表现出更大的值(P < 0.05)。总的来说，这两个群体的直接比较揭示了MTU的具体差异，可以想象，这与通过不同学科的培训强加的长期要求有关。

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来源期刊

Journal of Applied Biomechanics 医学-工程：生物医学

CiteScore

2.00

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The mission of the Journal of Applied Biomechanics (JAB) is to disseminate the highest quality peer-reviewed studies that utilize biomechanical strategies to advance the study of human movement. Areas of interest include clinical biomechanics, gait and posture mechanics, musculoskeletal and neuromuscular biomechanics, sport mechanics, and biomechanical modeling. Studies of sport performance that explicitly generalize to broader activities, contribute substantially to fundamental understanding of human motion, or are in a sport that enjoys wide participation, are welcome. Also within the scope of JAB are studies using biomechanical strategies to investigate the structure, control, function, and state (health and disease) of animals.