Russian cosmonaut Oleg Kotov, Expedition 38 commander, prepares to perform a session with the Motocard experiment, using the Treadmill Vibration Isolation System (TVIS) in the International Space Station's Zvezda Service Module. Motocard studies locomotion in crew members so specialists can design better training systems for future station residents. Russian cosmonaut Sergey Ryazanskiy, flight engineer, assists Kotov.