Fig. 1: The postures simulated in 1G gravity and microgravity.
From: Effect of microgravity on mechanical loadings in lumbar spine at various postures: a numerical study

a Relaxed standing posture in 1G gravity (Neutral 1G); this posture was also used in microgravity for comparison (Standing 0G), b relaxed floating posture in microgravity (Neutral 0G), and c fetal tuck posture in microgravity (Fetal Tuck 0G).