NASA astronaut Chris Williams jogs while strapped to the treadmill inside the International Space Station

iss074e0792349 (June 7 ,2026) --- NASA astronaut and Expedition 74 flight engineer Chris Williams jogs while strapped to the treadmill inside the International Space Station's Tranquility module. The treadmill, formally known as COLBERT (Combined Operational Load-Bearing External Resistance Treadmill), is specifically designed to enable jogging and maintain cardiovascular health in microgravity. Williams is wearing a heart-rate monitor that uses Bluetooth to transmit his cardiac data to a computer tablet for analysis by doctors on Earth.