Figure 6From: Comparison of knee motion on Earth and in space: an observational studyChange in the percentage duration of total muscle action onboard the ISS relative to the total muscle action duration on Earth. Mean data are presented for both subjects and both muscles. The action is either concentric, eccentric, or isometric. A positive value indicates a greater amount of that quantity onboard the ISS. Note the increase in the relative amount of isometric action for all subjects and both muscles, primarily at the expense of eccentric action.Back to article page