Plenty of fitness trackers can track your steps and measure your heart rate, but few manage to become exercise devices in their own right. WellShell, a device announced today from Tao Wellness, is an isometric exercise device that tracks your progress with companion apps for Android and iOS. Tao's app offers 50 different isometric exercises, which involve applying pressure to the WellShell in different ways. On one hand, it's hard to imagine many people squeezing their way to fitness.



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