Abstract: An exercise device has a pair of handles with a resistance assembly connected therebetween. Each handle has an internal annular channel with a stop wall. Each channel receives a grip body and a grip spring that serially abut one another, with the grip spring disposed between the grip body and the stop wall. In use, a user rotates each handle to compress the grip springs and applies tension by bending the resistance assembly. As a result, exercise of the six primary muscle groups responsible for postural stability muscles is provided to the user. Each of the handles are also easily removable from the resistance assembly by way of spring loaded plungers, which allows for different resistance assemblies of different spring force or resistance. The handles are further connected in a nonaligned manner relative to the resistance assembly, which contributes to maximizing the exercising benefits received from the exercise device.