We claim the ornamental design for a recumbent exercise cycle, as shown and described.
FIG. 1 is a front, side perspective view of a recumbent exercise cycle;
FIG. 2 is a side view of the recumbent exercise cycle of FIG. 1;
FIG. 3 is a top view of the recumbent exercise cycle of FIG. 1;
FIG. 4 is a front view of the recumbent exercise cycle of FIG. 1; and,
FIG. 5 is a rear view of the recumbent exercise cycle of FIG. 1.
The ornamental design that is claimed is shown in solid lines in the drawings. The broken (dashed) lines shown in the drawings are included for the purpose of illustrating environmental elements only and form no part of the claimed design.