Abstract: An exercise device is disclosed having a main body including a chamber formed therein and a pair of spaced apart outer hubs disposed thereon. The main body is configured to be grasped by a user. The exercise device may also include at least one containment article having a chamber formed therein and extending between the outer hubs. A displaceable component may be disposed in the chamber of at least one of the main body and the at least one containment article to provide a selected total weight to the exercise device.

Abstract: An exercise device is disclosed having a main body including a material chamber formed therein. A flowable material is disposed within the material chamber and a level indicator is coupled to the main body. The exercise device is grasped by user. The flowable material and the level indicator provide sensory feedback to the user in respect of maintaining the exercise device in a substantially level position while in use.

Abstract: System for monitoring vehicle operating conditions and parameters and issuing warnings to the operator when a predetermined vehicle status is present. The predetermined vehicle status includes a variety of unsafe driving conditions and is responsive to a changing center of gravity. The warnings include visual, audible and tactile feedback. By way of the tactile feedback, the system can affect the operator's operation of the vehicle to prevent vehicle instability, rollover, loss of vehicle control or other unsafe driving conditions from occurring.