NASA astronaut Jessica Meir replaces components on a new exercise device

iss074e0490818 (April 15, 2026) --- NASA astronaut and Expedition 74 flight engineer Jessica Meir works inside the International Space Station's Columbus laboratory module replacing components on the new European Enhanced Exploration Exercise Device, or E4D, to ensure its accurate motion, alignment, and system longevity. The E4D was delivered on Northrop Grumman's second Cygnus XL cargo mission and will be evaluated for its ability to support crew workouts on missions to the Moon, Mars, and beyond.