About 6 million workers worldwide receive wearable fitness trackers as part of workplace wellness programs. Many of these voluntary health programs give workers free or discounted trackers and health insurance discounts that range from about $100 to more than $2,000, depending on the company. While the financial incentives get many people moving, if Congress repeals the Affordable Care Act, insurers could use your fitness data to deny you coverage based on a medical condition that your tracker detects. Read more about it at NPR.