Anatomy of the muscle-tendon system is an important component to musculoskeletal models. In particular. the cross-sectional area of belly (mCSA) and tendon (tCSA) provides information about the maximum force that a muscle may exert. The ratio of mCSA to tCSA (rCSA) demonstrates how muscle force is related to the ability to resist/transmit the force to bone. https://parisnaturalfoodes.shop/product-category/pycnogenol/