File:Muscle Figure 6-2.jpg

English: Figure 6-2. Changes in upper and lower limb volumes obtained by circumference measurements of 3-cm segments in the three crewmembers from Skylab 4. It should be noted that, because of a much higher exercise volume in the Skylab 4 crewmembers, their loss of muscle volume was much less than observed in crewmembers from Skylab 2 and 3. From reference. ^{[§ 1]:pages}