A portable exercise system includes a customizable pouch for positioning proximate the upper torso of a user, as well as customizable resistance bands. The resistance bands may detach from the pouch and be selected based upon a user's height, age, girth, preference, etc. The system may also include interchangeable handles for additional muscle training and memory, and therapeutic benefits. For instance, handle attachments may be squeezable and/or simulate a baseball. A back support and belt mechanism may be included where desired. The system may include attachments to facilitate exercise while sitting, e.g., traveling.