NOVELTY - The belt (1) has a spine (15) with a front side (18) and a back side (20) supporting a weight (31), where the weight is inserted into an interior (27) of pocket (17). A button and a zipper are provided on the pocket. A strap (37) is attached to the spine, where the strap is provided with a front side (47) and a back side (49). A portion of the strap lays substantially flat against a portion of the spine. A hook and loop fastener system is located on the strap.    USE - Used by a public e.g. athlete, for a physical activity e.g. muscle training, sport such as baseball, softball, tennis, hockey and golf, weight training, exercise, muscle therapy, scuba diving, jogging, and physical therapy.    ADVANTAGE - The weight is inserted into the interior of pockets, thus allowing the user to increase muscle resistance, and hence increasing muscle mass and/or memory while training or exercising. The belt is thin and increases flexibility of the user`s torso. The belt is suitable for a rigorous use associated with continues daily use of weighted belts in sports, and does not dig into the body of the user. The belt allows isolated muscle stimulation during physical activity and repairs damaged muscles of the user, and also reduce pain of the user. The belt improves the performance of an athlete`s swing in baseball, tennis or golf. The belt assists in increasing the fat burned by the user and increases muscle gain during physical activity. The belt decreases stress and shock on the user during physical activity. The belt keeps the body balanced in a power position on the back leg of the user throughout the release of power in a swing or a throw. The belt reduces the risk of arm injuries through enhanced stability and balance drills.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method of exercising.    DESCRIPTION OF DRAWING(S) - The drawing shows a side plan view of a weighted belt.    Adjustable weighted belt (1)    Spine (15)    Pocket (17)    Front sides (18, 47)    Back sides (20, 49)    Interior (27)    Weight (31)    Strap (37)    Top side3(45) Bottom side (43)    Sewn line (50)