ISS031-E-144497 European Space Agency astronaut Andre Kuipers (foreground), Expedition 31 flight engineer, equipped with a bungee harness, exercises on the Combined Operational Load Bearing External Resistance Treadmill (COLBERT) in the Tranquility node of the International Space Station and Russian cosmonaut Oleg Kononenko, commander, is visible in a crew compartment. Russian cosmonaut Gennady Padalka (background), flight engineer, exercises using the advanced Resistive Exercise Device (aRED).