Are the mechanical properties of Achilles tendon altered in CrossFit athletes? Reliability and accuracy of myotonometry.

IF 0.8 4区 医学 Q4 BIOPHYSICS
Sebastian Szajkowski, Jarosław Pasek, Michał Dwornik, Mateusz Zajączkowski, Grzegorz Cieślar
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引用次数: 0

Abstract

Purpose: Tendons adapt to loads affecting them by changing tendons' mechanical and morphological properties. The aim of the study was to investigate the influence of involvement in sport activities in the form of CrossFit training by individuals of different age upon the mechanical properties of Achilles tendon.

Methods: 231 people participated in the study. One group consisted of subjects who trained CrossFit as amateurs, the other group comprised subjects who were not physically active. Achilles tendon was studied for various positions of the ankle joint: 0° DF/PF, 10° DF, 20° DF, 20° PF and 40° PF. The following mechanical and viscoelastic tendon properties were measured using MyotonPRO: frequency [Hz], stiffness [N/m], decrement [log], relaxation time [ms] and creep [De]. The results have been compared in reference to physical activity, BMI, age and length of training history.

Results: Both the tension and stiffness increased with degree of Achilles tendon stretching and decreased as it contracted. Higher values have been noted in the group of people in training and with higher BMI values. The elasticity of Achilles tendon decreased with plantar flexion increase. Lower elasticity has been recorded in the group in training and with higher BMI. No significant influence of age and length of training history upon the parameters achieved has been noted.

Conclusions: The specificity of CrossFit training and accompanying mechanical load result in development of adaptation changes in Achilles tendon, in the form of its higher tone/tension and stiffness, as well as lower elasticity.

CrossFit 运动员跟腱的机械特性是否发生改变?肌力测定法的可靠性和准确性。
目的:肌腱通过改变肌腱的机械和形态特性来适应对其产生影响的负荷。本研究旨在调查不同年龄段的人以 CrossFit 训练的形式参与体育活动对跟腱机械性能的影响。一组是进行 CrossFit 业余训练的受试者,另一组是不参加体育活动的受试者。跟腱在踝关节的不同位置进行了研究:0° DF/PF、10° DF、20° DF、20° PF 和 40°PF。使用 MyotonPRO 测量了以下肌腱的机械和粘弹特性:频率[Hz]、硬度[N/m]、递减率[log]、松弛时间[ms]和蠕变[De]。测量结果与体力活动、体重指数、年龄和训练时间长短进行了比较:结果:张力和僵硬度都随着跟腱拉伸程度的增加而增加,随着跟腱收缩程度的增加而减少。在接受训练和体重指数值较高的人群中,跟腱张力和僵硬度的数值较高。跟腱的弹性随着跖屈增加而降低。接受训练和体重指数(BMI)较高的人群的跟腱弹性较低。年龄和训练历史的长短对所达到的参数没有明显影响:CrossFit训练的特殊性和伴随的机械负荷导致跟腱发生适应性变化,表现为跟腱的张力/拉力和僵硬度增加,弹性降低。
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来源期刊
Acta of bioengineering and biomechanics
Acta of bioengineering and biomechanics BIOPHYSICS-ENGINEERING, BIOMEDICAL
CiteScore
2.10
自引率
10.00%
发文量
0
期刊介绍: Acta of Bioengineering and Biomechanics is a platform allowing presentation of investigations results, exchange of ideas and experiences among researchers with technical and medical background. Papers published in Acta of Bioengineering and Biomechanics may cover a wide range of topics in biomechanics, including, but not limited to: Tissue Biomechanics, Orthopedic Biomechanics, Biomaterials, Sport Biomechanics.
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