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Q&A 457: The Truth About Whether Alcohol Is Actually Bad For You, Health Benefits Of Ice Cream, Are Wearables Accurate, What Is Brown's Gas & Much More!
Ben Greenfield Life
How Apple Watches Can Overestimate Your Heart Rate and Calories
Wearable devices have as much as a 20% error when measuring heart rate and calorie expenditure. Most of them overestimate total sleep time and underestimate wakefulness after sleep onset. On average, exercise intensity, the motion of your extremities during exercise, the wrist position and any interference like sweat or dirt on the skin along with skin pigmentation have all been shown to decrease the accuracy of wearable devices.
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