Abstract: An adjustable dumbbell includes a number of weights each having a slot to receive end portions of a bar, and a number of latch rods slidably engaged in the weights and each having an inner end engageable into the slots of the weights and engageable with the bar, to anchor and latch a selected number of the weights to the bar, and to allow the selected weights to be moved in concert with the bar. The weights each has a spring member to bias and force the inner end of the latch rod to engage with and to latch the weights to the bar. The weights each includes a panel having an orifice to slidably receive the latch rod, and to anchor the latch rod to the panel when the catch of the knob is rotated relative to the panel.

Abstract: A weight lifting device includes a handle having two end segments, a number of weight members each having a slot to receive either of the end segments of the handle, and an anchor plate rotatably attached to each of the weight members and having an opening selectively aligned with the slot of the weight member, to selectively receive either of the end segments of the handle. The anchor plate is rotatable relative to the weight member to offset the opening of the anchor plate from the slot of the weight member, and to selectively anchor the weight member to the handle. The desired number of weight members may thus be selectively attached to the handle.

Abstract: A rotating and swinging exerciser includes a base, a housing rotatably attached onto an axle of the base, a frame disposed on the base and having an inclined peripheral surface, and a lever pivotally secured to the housing with a pivot pin and having two foot pedals pivotally attached to two end portions. The lever is slidably engaged onto and movable along the inclined peripheral surface of the frame, and to cause the housing to rotate relative to the base. One of the foot pedals may be forced to move upwardly along the inclined peripheral surface of the frame when the other foot pedal is stepped downwardly by a user and when the lever is moved along the inclined peripheral surface of the frame.