this application discloses a portable exercise device for flexibility and strengthening . in some embodiments , the device is comprised of one elastic band of surgical tubing or like material and one non - elastic band , with two pairs of looped handles tied to each end of the elastic band . these looped handles can attach to a user &# 39 ; s limb without any need for grasping . the non - elastic end of the device can be affixed to an anchor point . the exercise device offers light but adjustable resistance via a resistance modulator , allowing the user to engage in a full range of standing and seated exercises with forces comparable to swimming . in addition , two instances of the device can be combined to engage both the user &# 39 ; s hands and feet simultaneously .