A biomechanical body model for illustrating body mechanics. The body model includes components representing the torso, upper leg, and lower leg which can be altered in length to represent the variations in human segmental proportions and their combined influences on an individual's mechanical ability to move between a standing position and a seated or squatting position. Manipulation of these variables is further influenced by a range of available mobility of respective joints interconnecting the body segments. Outcomes of permutations of both the variations in segmental proportions and joint mobility is further influenced by variations in the relative plane of gross lower extremity motion as demonstrated by manipulation of a secondary hip axis. The system also incorporates various muscle segments to demonstrate impact of body movements on muscles and restrictions that muscles may present for body movements.