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Human or Earth orientated beings struggle in altered- or micro-gravity (ųg).  It is apparent that human cells are uniquely bound to the Earth gravity of 9.8 m² (1g). When humans are removed from 1g experience shows that almost all physiological systems are affected.  Such data that has been collected over the years from various space programs: The Russian Soyuz and MIR missions, The International Space Station (ISS), Skylab and from relatively short haul shuttle resupply and satellite launch missions. 

Mission data confirms that even minute changes in gravity can have significant effects on human health. To appreciate these concepts, ISS gravity is 89% of 1g but effective gravity is 0, hence even short trips of 2 weeks create appreciable measurable bony changes on the osteoporotic continuum in astronauts.

These altered gravity impacts have been described affecting the musculoskeletal, cardiovascular and immunological systems and are hypothesized to be the expression of cellular change. If short exposure to altered gravity creates physiological changes, it can be assumed that biological protection will be needed for humans in this hostile environment, with particular consideration given to longer journeys or colonization.

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