The Original SANDDUNE™ enables your ability to respond to your environment like no other piece of exercise equipment. It challenges your response by providing a “mobile” walking surface that is constantly shifting and changing due to the movement of your own body. It wakes up your senses that tell you where you are in space, how much effort is required and which muscles you need to use to maintain balance. Walking in place on the SANDDUNE™ requires your muscles and brain to react both quickly and constantly. Faster reaction time improves your balance, coordination and mobility. This translates into better reflexes and improved use of your body in general.