Tendon compliance and preload must be considered when determining the in vivo force-velocity relationship from the torque-angular velocity relation.

ABSTRACT: In vivo, the force-velocity relation (F-v-r) is typically derived from the torque-angular velocity relation (T-ω-r), which is subject to two factors that may influence resulting measurements: tendon compliance and preload prior to contraction. The in vivo plantar flexors' T-ω-r was determined during preloaded maximum voluntary shortening contractions at 0-200°/s. Additionally, we used a two factor block simulation study design to independently analyze the effects of preload and tendon compliance on the resulting T-ω-r. Therefore, we replicated the in vivo experiment using a Hill-type muscle model of the gastrocnemius medialis. The simulation results matched a key pattern observed in our recorded in vivo experimental data: during preloaded contractions, torque output of the muscle was incre

SUBMITTER: Holzer D 

PROVIDER: S-EPMC10121672 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature