Integrated Biomechanical Modeling of Lower Body Exercises on the Advanced Resistive Exercise Device (ARED) Using LifeMOD?

摘要

The NASA Digital Astronaut Project (DAP), in collaboration with subject matter experts, implements well-vetted computational models to predict and assess spaceflight health and performance risks, and to enhance countermeasure development. The DAP is currently integrating biomechanical modules of specific exercise movements with dynamic modules of spaceflight exercise devices on which the exercises were performed. By comparing the results of the integrated modules to the results of the biomechanical module alone, it is possible to gain insight into the effects of the human-device interaction, adjustments to posture and device loading on outcomes, namely forces and torques at specific anatomical sites. The results of these simulations can also be used to gain insight into the minimum amount of exercise and exercise equipment required to maintain bone and muscle health, as well as prescribing subject specific exercise protocols. The focus of this paper is provide an overview of the high fidelity biomechanical models that were developed for resistive exercise performance analysis on the Advanced Resistive Exercise Device (ARED) used onboard the International Space Station (ISS). To date, we have developed biomechanical modules for squat and deadlift exercises using LifeMOD? (Life Modeler, Inc., San Clemente, CA) and integrated them with a multibody dynamics module of the ARED, which was developed using Adams? (MSC Software, Inc., Santa Ana, CA). We will describe the integration process, analysis methods, preliminary results and validation activities. Finally, we will describe ongoing and future work that involves other exercise movements and compact exercise devices for Exploration class missions on the Multi-purpose Crew Vehicle (MPCV).