All of the following factors normally increase the length of the ventricular cardiac muscle fibers, except:
Increased venous tone
Increased total blood volume
Increased negative intrathoracic pressure
Lying-to-standing change in posture
When the person stands from a lying position, there is pooling of blood in the legs. This causes decrease in venous return and decrease in end diastolic volume (and length of ventricular cardiac muscle fibers).