Abstract: A method of fatiguing a target muscle group of a user using an exercise device includes grasping in each hand one of a pair of outer handles of an exercise device, positioning the user's feet to be substantially aligned with the user's shoulders while maintaining the user's torso in a substantially upright orientation, positioning each hand in an initial position relative to the user's torso, cyclically pulling the outer handles away from one another in a cyclic motion to apply a cyclic pulling force to the tethers to cause the central disk to alternately rotate in opposing directions of rotation, and moving one or both hands to a secondary position relative to the user's torso and repeating the application of the cyclic force to fatigue the initial target muscle group or to fatigue a secondary target muscle group.

Abstract: An exercise device comprises a pair of outer handles and an inner, central disk, rotatable relative to the handles. The disk includes at least a pair of orifices formed therein or therethrough. At least one tether or cord extends between the handles and through the orifices in the central disk. Manipulation of the handles by a user results in cyclic spinning of the disk.

Abstract: Materials and methods for making and using a bird call device involving a surface having a central axis perpendicular to the surface and an opening that is displaced from the central axis by a distance, with the opening being shaped to emit a bird call when the surface is rotated about the central axis.

Abstract: A playground-spinning element with noise making device for use in association with a playground set is provided. The element allows the user to play using fine motor skills such that the user causes the creation of rain-like sounds by his action. The element also provides interest in that the user, and other viewers, may view the spinning of an interestingly shaped object. In a preferred embodiment, the device housed within a play panel such that it is visible from two sides, and can be accessed by users on both sides of the panel.