The equipment, a Cybex leg extension machine, was not broken or faulty.

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In the inhibit mode, the robotic device would be used as an in-space exercise machine to supply resistance against leg movement.

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Clad in a tight white T shirt and spandex shorts, and weighing all of 153 pounds at 5 feet 8 inches tall, he sits at a leg-lifting machine with his knees at his chest.

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The two main exercises for quadriceps include leg extensions (usually done on an exercise machine) and squats.

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