The Evolution of Biomechanics

The size of the moment on the basically vertical distance of that biceps muscle away from the bone is much, much greater in the flex position. When they go into the extended position, it pretty much all but disappears. We have to be cognizant of when people start doing stuff like wrapping rubber bands around skeletons and stuff like that,. It's not an accurate representation of what's going on with the leverages or the internal moment arms.