A therapeutic exercise device includes an elongated, hollow tube having a sleeve slidably and rotatably mounted thereon. The sleeve is held on the tube by a pair of opposing retainers, each having a rounded end cap attached thereto. Either cap is removable to expose an interior chamber for receiving a desired number of weighted cylinders that vary the overall weight of the tube. Accordingly, a user loads the chamber with a desired number of weighted cylinders and grasps the tube with one hand. The sleeve is grasped and reciprocally rotated with the other hand to exert the hand, wrist and forearm muscles.