Purpose: The aim of the study was to analyze the connections between the functional asymmetries of lower limbs, taking into account morphological feet features, and ankle dorsi- and plantarflexion maximal torques in men and women.
Methods: The study population consisted of 56 young subjects among which there were 30 women and 26 men. The assessment of upper and lower limbs' side dominance was performed on the basis of surveys, verified with simple motor tasks that resembled the actions characteristic of the upper and lower limbs. The measurements of body build, as well as foot build, were performed with the use of accepted instruments according to the anthropometry standards. The measurements of longitudinal foot arches were conducted using the pantographic method. Ankle dorsi- and plantarflexion maximal torque values were measured under static conditions.
Results: We found a positive correlation between the functional dominance of lower limb and greater strength only for ankle plantarflexion maximal torque values in correct laterality variants in women and in only one variant in men. No correlation was found between foot morphological asymmetry and the ankle dorsi- and plantarflexion maximal torque values, either in women or in men.
Conclusion: Our results support the idea that the functional lower limb dominance is not equivalent to the greater muscle strength.
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J Electromyogr Kinesiol
January 2025
Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Road E, Guelph, ON N1G 2W1, Canada. Electronic address:
Rate of torque development (RTD) measures how rapidly one can generate torque and is crucial for balance and athletic performance. Fast RTD depends on the rapid recruitment of high threshold motor units (MUs). Cutaneous electrical stimulation has been shown to alter MU excitability, favoring high threshold MUs via reduced recruitment thresholds.
View Article and Find Full Text PDFJ Appl Physiol (1985)
December 2024
Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Portugal, Estrada da Costa, 1499-002, Cruz Quebrada, Dafundo, Portugal.
The interaction between muscle strength and endurance impacts athletic performance. Integrating both modalities into concurrent exercise (CE) is challenging due to the interference effect. This study explored the acute effects of resistance-only (R), endurance-only (E) and CE sessions on voluntary muscle strength, evoked neurophysiological parameters and contractile properties of the plantar flexors.
View Article and Find Full Text PDFJ Bodyw Mov Ther
October 2024
Faculty of Sport Sciences, Waseda University, Saitama, Japan. Electronic address:
Background: Radial pressure wave (RPW) has been introduced to sports sites as an alternative tool to massage, and there have been reports of irradiating muscles. This study aimed to clarify the effects of RPW irradiation on muscles, focusing on muscle morphology and muscle/fascial elasticity.
Methods: The participants were 23 healthy, able-bodied participants.
J Biomech
December 2024
Department of Neuroradiology, Medical Imaging Centre, Semmelweis University, Budapest, Hungary. Electronic address:
We determined the effects of knee joint position on the relationship between maximal voluntary contraction (MVC) isometric plantar flexor torque and architectural properties of the plantar flexors measured at rest in healthy young adults. We obtained 3-D reconstructed muscle architecture data of the right plantar flexor muscles of nine physically active males using T1 and DTI MRI sequences with the knee in ∼5° flexion and at rest. Muscle volume, fascicle length, pennation angle, and physiological cross-sectional area were estimated for the medial and lateral gastrocnemius and the soleus muscle.
View Article and Find Full Text PDFPLoS One
October 2024
UR 7377 BIOTN, Laboratoire Analyse et Restauration du Mouvement, Université Paris Est Créteil (UPEC), Créteil, France.
Background: Functional correlates of spastic myopathy, the muscle disorder of spastic paresis, are unknown.
Objective: To explore reciprocal relationships between clinical and structural parameters of plantar flexors with i) ambulation speed, ii) dorsiflexion and plantarflexion torques in chronic hemiparesis.
Methods: Cross-sectional trial in chronic stroke-induced hemiparesis (>6 months).
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