A pendulum jump rope for use in confined spaces is described; wherein this pendulum jump rope operates in back and forth pendulum motion such that a flexible elongate member of the pendulum jump rope never has to pass above a user's waist. In some embodiments, the pendulum jump rope may comprise a pair of principal elongate-members; and the flexible elongate-member; wherein the flexible elongate-member may join one of the principal elongate-members to the other principal elongate-member. Free ends of the pair of principal elongate-members may be grasped as handles by the user. Each of the principal elongate-members may also have a joint that is flexible but also resilient; wherein these joints may contribute to the pendulum motion of the flexible elongate member.