Abstract: An exercise extension device is provided which is adapted to attach to existing rowing exercise machines allowing the user to exercise while in a fully reclined position. The apparatus comprises a padded platform which attaches behind the seat of the rowing exercise machine so that the user may comfortably change from a sitting to reclining position. Ground-engaging wheels are attached to the rear of the padded platform thereby allowing the exercise extension device to move as the seat of the rowing exercise machine moves. A roller is attached to the front of the padded platform which rides on the same track as the seat of the rowing exercise machine. The roller can be easily adapted to a wide variety of existing designs of rowing exercise machines. Further, the height of the roller and the ground-engaging wheels are adjustable in order to adapt to a wide variety of existing rowing machines.