An astronaut on the International Space Station has just completed the first rope-pulling workout ever performed in space. ESA astronaut Sophie Adenot activated the European Enhanced Exploration Exercise Device, or E4D, inside the Columbus laboratory on July 8, 2026. The rope-pulling exercise targets upper-body muscles used in pulling and stabilization movements, adding a completely new category of training to the station's fitness options.
A single machine that does the work of several
E4D combines resistive training, cycling, rowing and rope pulling into one compact system. It supports more than 30 strength exercises and numerous variations, giving astronauts a broader range of workouts while taking up less space than traditional equipment. The device was developed by the Danish Aerospace Company alongside NASA's Vibration Isolation System. ESA commissioned the project to expand the station's exercise capabilities and prepare for future exploration missions.
Why exercise matters when gravity disappears
Without Earth's constant pull, astronauts experience rapid physical deconditioning that affects their health, performance and safety. Daily exercise sessions of about 90 minutes on machines like the T2 treadmill, the CEVIS bike or the ARED weightlifting machine are the most effective countermeasures currently available. But those machines have limitations. E4D is designed to overcome them by offering more variety and taking up less space. Sophie Adenot, who activated the system during her epsilon mission, said she loves exercising and found it exciting to add variety to on-orbit workouts.
What comes next for the E4D experiment
Over the next two years, crews will evaluate the device's design, operational performance and effectiveness in counteracting the physical effects of microgravity. Future testing phases will also assess its integrated motion-capture system, which helps astronauts track their performance and correct posture in real time. That built-in capability aims to reduce reliance on ground supervision and support safe, precise and effective training in orbit. The main goal of the E4D testing is to find better ways to keep astronauts healthy during long-duration space missions, especially as agencies prepare for deeper exploration beyond the space station.
