Effects of Knee Joint Angle and Contraction Intensity on the Triceps Surae Stiffness

Lin, Ming V.; Deng, Weixin; Liang, Hongying; Yu, Suiqing; Xu, Qin; Liu, Chunlong

doi:10.3389/fbioe.2022.913423

Cited by 3 publications

(2 citation statements)

References 42 publications

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“…Our recent research has shown that joint exion angle and rotation, as independent factors or interactive effects, can have a signi cant impact on corresponding muscle hardness and muscle strength 34 .…”

Section: Discussionmentioning

confidence: 99%

Inability of Quadriceps Muscular Stiffness to Explain Variances in Torque during Isometric Knee Extension Tests Across Different Degrees of Knee Position in Healthy Individuals

LI,

He,

Pan

et al. 2024

Preprint

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Objective This study aims to assess how internal (IR) and external (LR) knee joint rotation affect stiffness and strength in quadriceps femoris (RF, VL, and VM) during isometric knee extensor tests at various knee flexion angles (30°, 60°, 90°), and to explore their relationship. Methods A descriptive observational cohort study recruited 46 healthy young adults. Participants performed maximum voluntary quadriceps contractions at three knee flexion angles (30°, 60°, 90°), with three tibial rotation conditions (internal 10°, neutral, external 10°) set for each angle. Muscle hardness of dominant lower limb RF, VL, and VM was recorded using MyotonPro during isometric knee extensor tests. Isokinetic training instrument measured quadriceps femoris strength under neutral, 10° external, or 10° internal tibial rotation. Statistical analysis employed repeated measures general linear models. Results Knee joint rotation and flexion did not interact. Muscle hardness of RF, VL, and VM significantly increased during isometric knee extension compared to resting, but rotation angle and tibial position showed no significant differences. Quadriceps femoris strength was unaffected by 10° tibial rotation but varied with knee flexion angle, notably greater at 60° flexion (P < 0.01). Moderate correlations were observed between quadriceps muscle hardness and strength in each group. Conclusion Isometric knee extension force remains unaffected by tibial position but correlates with knee flexion angle. However, quadriceps femoris muscle hardness does not vary significantly with knee rotation or flexion. MyotonPro-measured muscle hardness under different conditions may not fully explain corresponding muscle strength variations.

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Section: Discussionmentioning

confidence: 99%

Inability of Quadriceps Muscular Stiffness to Explain Variances in Torque during Isometric Knee Extension Tests Across Different Degrees of Knee Position in Healthy Individuals

LI,

He,

Pan

et al. 2024

Preprint

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“…It transmits and tracks shear waves to obtain Shear modulus values, and dynamically depicts the distribution of SWE in target tissues in real time ( Niu et al, 2022 ). Shear modulus value can be used to quantify local muscle stiffness ( Chalchat et al, 2022 ), and tiffness is a proxy for the force of muscle contraction ( Lin et al, 2022 ). Evaluating the passive and active mechanical properties of QF can reflect the contractile performance of its muscles.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the asymmetries in muscle mass, biomechanical property and muscle activation asymmetry of quadriceps femoris between patients with unilateral and bilateral knee osteoarthritis

Chen,

Li,

Wang

et al. 2023

Front. Physiol.

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Background: More and more attention has been paid to the research of muscle mass and muscle quality of quadriceps femoris (QF) in knee osteoarthritis (KOA). This study aimed to explore the asymmetric changes of muscle mass, biomechanical property and muscle activation in the inter-limbs QF of KOA patients, and tried to provide a novel insight for the evaluation, prevention and treatment of KOA.Methods: A total of 56 Participants with unilateral or bilateral KOA were included in this study: 30 patients with unilateral pain and 26 patients with bilateral pain were assigned to the bilateral group (BG) and unilateral group (UG), respectively. The symptom severity of bilateral lower limbs was evaluated by visual analogue scale, and the relatively serious leg (RSL) and relatively moderate leg (RML) were classified. The thickness of rectus femoris (RF), vastus intermedius (VI), vastus medialis (VM) and vastus lateralis (VL) were measured by ultrasound. The Shear wave elastography (SWE) techniqie was used to measure the shear modulus of RF, VM and VL. Surface electromyography (sEMG) was used to assess the root mean square (RMS) of the RF, VM, and VL during straight leg raising in a sitting position and squatting task. We calculated the asymmetry indexes of inter-limbs for the corresponding indices of the measured muscles.Result: Thickness of RF, VI and VL of RSL was lower than those on RML (p < 0.05), and thickness of VM was lower more significant (p < 0.01). Thickness of RF, VI and VL of RSL was also lower than those of RML in BG (p < 0.05), however, there was no significant difference in VM thickness (p > 0.05). There were no significant difference in Asymmetry indexes of all measured muscle thickness between the two groups (p > 0.05). The Shear modulus of RF, VM, and VL in the RML of UG and BG was higher than those in the RSL (p < 0.05). In sitting and straight leg raising task, the RMS of RF, VM and VL in RML were higher than those in RSL, UG and BG both showed this trend (p < 0.05). About squatting task, in UG, the RMS of the three muscles in RML of patients were also higher than those in the RSL (p < 0.05). However, the difference was not significant in BG (p > 0.05). In the straight leg raising task, the asymmetry indexes of RMS in RF, VM, and VL of both the two groups were positively correlated with VAS scores (p < 0.05).Conclusion: The muscle thickness, shear modulus and muscle activation electromyography of QF in RML were higher than those of RSL in unilateral KOA patients. The VM of RML in bilateral KOA patients may show muscle thickness degeneration earlier, which is closer to the VM of RSL. The shear modulus of RF, VM, and VL were higher on the RML side during the single-leg task, but there may be passive compensation for muscle activation in both lower limbs during the bipedal task. In conclusion, there is a general asymmetry of QF muscle mass, biomechanics Characteristic and performance in patients with KOA, which may provide new ideas for the assessment, treatment and rehabilitation of the disease.

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Effect of knee joint angle on vastus medialis and vastus lateralis rigidity during isometric submaximal voluntary knee extensions

Bouvier,

Ogier,

Martin

et al. 2023

Journal of Electromyography and Kinesiology

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Effects of Knee Joint Angle and Contraction Intensity on the Triceps Surae Stiffness

Cited by 3 publications

References 42 publications

Inability of Quadriceps Muscular Stiffness to Explain Variances in Torque during Isometric Knee Extension Tests Across Different Degrees of Knee Position in Healthy Individuals

Inability of Quadriceps Muscular Stiffness to Explain Variances in Torque during Isometric Knee Extension Tests Across Different Degrees of Knee Position in Healthy Individuals

Comparison of the asymmetries in muscle mass, biomechanical property and muscle activation asymmetry of quadriceps femoris between patients with unilateral and bilateral knee osteoarthritis

Effect of knee joint angle on vastus medialis and vastus lateralis rigidity during isometric submaximal voluntary knee extensions

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