Hi-tech tracking to improve health

For weeks, he diligently recorded everything he ate until the data revealed a nutritional gap: not enough protein. Next, he strapped on a device to monitor his activity level. The numbers revealed the software engineer was a slug, averaging fewer than 1000 steps a day, well below the recommended 10,000-step mark.

Sieling, 27, who lives in Minneapolis, is part of the rapidly growing ‘quantified self’ movement — comprising people who collect data on everything from diet to blood sugar to sleep

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