ARED

At the start of an ISS mission, the loading is set at 60% of an astronaut's body weight. The astronaut increases the loading throughout the mission with a goal of attaining 85%-100% body weight of loading. Increasing the loading makes the workout more challenging.

The ARED employs vacuum cylinders to apply a load of up to 600 lb to a bar or a cable so that astronauts can perform heel lifts, squats, deadlifts, and other exercises, to strengthen the muscles that do not get much use in space. This device mimics weightlifting on Earth.

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