Influence of joint angle on muscle fascicle dynamics and rate of torque development during isometric explosive contractions
Robin Hager, Thomas Poulard, Antoine Nordez, Sylvain Dorel, Gaël Guilhem
Abstract
Ankle angle influences the operating muscle fascicle lengths of gastrocnemius medialis and the rate of torque development during explosive isometric plantar flexions. The rate of torque development peaks in neutral angles where muscle fascicles shorten over the plateau of the force-length relationship. When fascicles operate over the plateau of the force-length relationship (neutral ankle positions), the force-velocity properties represent a limiting factor for the rapid force-generating capacity from 100 ms after the onset of explosive contractions.
Topics & Concepts
Isometric exerciseFascicleAnklePlantar flexionAnatomyExplosive materialTorqueExplosive strengthMaterials scienceMathematicsPhysicsChemistryPhysical medicine and rehabilitationMedicineInternal medicineOrganic chemistryThermodynamicsMuscle activation and electromyography studiesSports injuries and preventionSports Performance and Training