ECONOMY

A top doctor doesn't use fitness trackers, but is obsessed with one health metric

A top doctor doesn't use fitness trackers, but is obsessed with one health metric

wera Rodsawang/Getty Images Measuring our health data with wearable tech is more pop
ular than ever.Dr. Suzanne O'Sullivan tracks her step count, but said healthy people shouldn't bu… [+3180 chars] wera Rodsawang/Getty Images Measuring our health data with wearable tech is more popular than ever.Dr. Suzanne O'Sullivan tracks her step count, but said healthy people shouldn't bu… [+3180 chars] Kim Schewitz Business Insider
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Youssef Hikal
May 14, 2026
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