Shorter muscle fascicle operating lengths increase the metabolic cost of cyclic force production
Owen N. Beck, Lindsey H. Trejo, Jordyn N. Schroeder, Jason R. Franz, Gregory S. Sawicki
Abstract
During locomotion, active muscles undergo cyclic length-changing contractions. In this study, we isolated confounding variables and revealed that cyclically producing force at relatively shorter fascicle lengths increases metabolic energy expenditure. Therefore, muscle fascicle operating lengths likely have a measurable effect on the metabolic energy expenditure during locomotion.
Topics & Concepts
FascicleAnkleSoleus muscleGround reaction forceEnergy expenditureMetabolic ratePlantar flexionAnatomyChemistryBiologySkeletal muscleEndocrinologyPhysicsKinematicsClassical mechanicsMuscle activation and electromyography studiesSports Performance and TrainingChildren's Physical and Motor Development