Abstract: Improved exercise assemblies and related methods of use are provided. More particularly, the present disclosure provides advantageous exercise assemblies that are adjustable, changeable and/or rotatable. The present disclosure provides for an exercise assembly that can function as a straight pull-up bar in one arrangement, and can also function as a dynamic, range-of-motion exercise assembly in another arrangement. The exemplary exercise assembly includes an advantageous design that permits users to not only perform straight bar pull-ups, but also allows users to quickly and easily convert the assembly into a two-handled, variable resistance, bicycle-style crank (e.g., a rotating bicycle pull up bar assembly) in which the user rotates two handles of the bar similar to how a cyclist rotates bicycle pedals.