An apparatus including first, second, third, and fourth vertical members, a first top horizontal member which joins a top of the first and a top of the second vertical members, a second top horizontal member which joins a top of the third and a top of the fourth vertical members, and a third top horizontal member which joins a top of the first top horizontal member and a top of the second top horizontal member. The first, second, third, and fourth vertical members, and the first, second, and third top horizontal members form a cage structure. The apparatus may also include first and second dumbbell holder members adjustably fixed to the cage structure. The apparatus may also include devices for suspending a first and a second dumbbell from the cage structure.