A dumbbell assembly includes a cradle shaped to receive a first dumbbell having a first weight set and a second dumbbell having a second weight set. The dumbbell assembly further includes an input mechanism in communication with a selection mechanism incorporated into the cradle where the selection mechanism is in communication with both a first selector arranged to adjust a first connection of the first weight set to the first dumbbell and a second selector arranged to adjust a second connection of the second weight set to the second dumbbell.