We continue our look back at some of our favorite episodes from the podcast. Do exercise-tracking apps and gadgets like the Fitbit actually make us healthier? Or do they just create a high-tech, data-centric illusion of control over our weight, sleep and general well-being? Bloomberg's Naomi Kresge loaded up some popular apps to find the answer –- and to see if she could get a better night’s sleep than her husband.

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