Transportation systems subject the human body to varying levels of vibrations, which causes lower back pain. Some studies presents that exposure to vibrations of 1.3 m/s 2 for ten minutes a day can be harmful even for healthy people. With transportation systems being part of our daily lives it is useful to better predict the effects of vehicle induced oscillations on human via mathematical models. Anthropometry of a person is highly important when it comes to fitting the occupant to the seat with the restraint system together with their mass. Spaceflight travel further complicate matters since 4–6 cm increase in body height can occur during space flight and space vehicles must be designed to accommodate these changes.

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