Now, being the epitome of health involves a ring, a watch, three apps, and a mild panic when the numbers waver. So, without further ado: keep scrolling for your ultimate guide to tracking your health without obsession. Don't miss our guides to the best fitness trackers, best fitness rings, best Garmins, and best Fitbits, while you're here - and happy tracking. We quizzed world renowned expertsDo Wearable Health Trackers Actually Work? Limits: Dr Hesketh warns, "There's limited research to support scheduling exercise, work, or sleep strictly based on wearable energy data.