Mechanical Properties of Muscles and Tendons in Asymptomatic Individuals with Generalized Joint Hypermobility

Taş, Serkan; Dikici, T.F.; Aktaş, Arda; Araci, A.

doi:10.32098/mltj.04.2021.05

Cited by 1 publication

(1 citation statement)

References 29 publications

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“…Several previous studies measured the stiffness between the MG and the LG using the MyotonPRO and reported greater stiffness of the LG, similar to the present study, but none of the studies observed differences between the muscles, nor did they focus on the reason for the greater stiffness of the LG at rest [ 6 , 15 , 26 , 48 ]. There are very few architectural differences between the muscles.…”

Section: Discussionsupporting

confidence: 80%

Differences in Medial and Lateral Gastrocnemius Stiffness after Exercise-Induced Muscle Fatigue

Lall

Alsubiheen

Aldaihan

et al. 2022

IJERPH

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Muscles are affected at the cellular level by exercised-induced fatigue, inducing changes in their stiffness. Examining muscle stiffness can improve the knowledge of various pathologic conditions, such as pain and injury. The objective of this study was to examine the stiffness of the medial gastrocnemius (MG) muscle and the lateral gastrocnemius (LG) muscle to determine the changes in stiffness, and to assess the differences in the stiffness between the MG and the LG, as affected by muscle fatigue measured using shear wave elastography (SWE) and a MyotonPRO after inducing muscle fatigue. A total of 35 healthy young adults participated in the study. The stiffness of the MG and the LG were assessed before and after a muscle fatigue protocol (MFP), which included three sets of 50 eccentric contractions of the calf muscles of the dominant leg, at rest, and at maximum voluntary contraction (MVC). The measurements were taken with SWE and the MyotonPRO simultaneously. Compared to baseline, the resting stiffness of the MG and the LG significantly increased immediately, 24 h, and 48 h after muscle fatigue (p < 0.05); however, during MVC, the stiffness of the MG decreased (p < 0.05) and that of the LG showed no change (p > 0.05). When the stiffness of the MG and the LG were compared before and after the MFP, changes in the stiffness of the MG were significantly greater than those in the LG (p < 0.05). This signifies that the MG was more affected by the exercise-induced muscle fatigue than was the LG. The assessment of musculoskeletal tissue and its characteristics, before and after eccentric exercise, is crucial in the prevention of overuse injuries associated with repeated exposure to both low and high levels of force.

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