Various embodiments relate to an exercise assembly and an exercise bed assembly. The exercise assembly includes a band configured to be fitted around the circumference of a bed mattress or support frame and includes areas to which exercise bands can be attached. One or more exercise bands can be attached so that a user can perform various bodyweight exercises. The exercise bands can be reset in various combinations in order to enable a user to complete different exercises. In some embodiments, the exercise assembly can also include reinforcements that are connected at multiple points of the band. In some instances, the reinforcements cover a side of the bed.