Constants of Movement of Muscular Activation and Force-Velocity Relationship from nonlinear Optimization

摘要

Just as a car needs an engine humans need skeletal muscles.With a better motor the car drives faster and optimizedmuscle properties lead to enhanced athletic performance.Whereas engines are exactly designed by engineers, humanmuscles mainly are trained without knowledge of the individual muscle parameters. To determine such parametersin vivo and non-invasively we have to convert externallyobserved values to internal ones. This can only be achievedwith an appropriate transfer function and a mathematicalmuscle model. Some parameters in this model are measureddirectly. To determine the remaining parameter values weuse nonlinear optimization strategies to match observeddata and model data. Therefore, the model has to berobust and simple enough to guarantee a unique solutionand it must incorporate the most important anatomicaland physiological facts.