Squeeze your way to fitness with Tao Wellshell sensor

... on ancient principles of isometrics, the science of applying pressure to build strength that's also seen in yoga and Pilates workouts. You squeeze the Wellshell with your palms or any other part of your body, such as between your knees. While doing ...

http://www.pcworld.com/article/2084360/squeeze-your-way-to-fitness-with-tao-wellshell-sensor.html#tk.rss_all