ABXCORE is compact, light-weight, and specially created to be utilized nearly anywhere. Abxcore is up to 300% more efficient than a regular sit-up.
Planking
Stealth Core Trainer Fun Interactive Abdominal Planking Workouts
The Stealth Core Trainer provides a dynamic core workout, and you can do within just 3 mins. The game playing unique technology distracts you from much more exciting and motivating training.