Take, for example, a colleague of mine. He believed he was eating within a narrow caloric window, but after careful tracking, he learned that he was putting away a bonus 500 Calories a day—in barbecue sauce.
That said, some of us are better than others.
Ben Johnson, the Canadian sprinter, was reported to have been able to call out his 100 metre time within a tenth of a second of the stopwatch readout.1
That’s outlier performance, to be clear, but it still makes you wonder:
How good are you at assessing yourself?
And, how can you improve your accuracy through the wise use of technology—like fitness trackers—to help you make better decisions about your health?
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