@sir Most of the flight and space research is focused on very high G impact on human body https://en.wikipedia.org/wiki/High-G_training
@sir I guess the body responds by increasing muscle mass up to some level (as used by body builders). Beyond some exposure it will however start deforming joints and backbone, which is e.g. seen in obesity.
@kravietz yeah, I'm thinking more prolonged exposure to 1-2G rather than instantaneous exposure to 5+G