Es ist doch bekannt, daß bei
Schwerelosigkeit bei Erwachsenen nach relativ kurzer Zeit (Wochen/Monate) gravierende Probleme auftreten. Aus einem Text der NASA:
http://ntrs.nasa.gov/archive/nasa/ca...2006255315.pdf
ein paar herausgegriffene Sätze:
More immediate physical effects are those induced by prolonged exposure to weightlessness. These include the loss of bone density, muscle mass, and red blood cells, cardiovascular, circulatory, and sensory-motor deconditioning, and changes in the immune system.
The long bones in the legs and the vertebrae in the spine lose mass and strength during prolonged bed rest [zu Testzwecken].
Similarly, a loss of bone mineral, and its
excretion, are observed in humans during spaceflight. Calcium is lost at a rate of about 1% per month, and the losses are reflected in the density and mass of weight-bearing bones. The rate of calcium loss is not reduced by vigorous exercise.
[Unterstreichung von mir]
Das reicht eigentlich schon. Zwar handelt es sich auf dem Mars "nur" um eine stark verminderte Schwerkraft