Figure 2
From: Muscle stiffness indicating mission crew health in space

Thigh and lumbar back muscular stiffness. Mean Stiffness [N/m] of: (a) MP8 Rectus Femoris; (b) MP9 Infrapatellar tendon; (c) MP5 lumbar Multifidus. Mean values (for each test condition) for individual astronauts (A-S) colour coded for visualization of intersubject variability; mean of n = 12 with standard deviation for preflight (BDC L-180 and BDC L-60, circle data points), inflight (FD5-15, FD30-60, FD121-150 and, R-10, square data points) and postflight (R + 1, R + 5, R + 30, and R + 105, triangle data points); *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001; ns = non significant.