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收录时间:2018-10-10 16:19

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运动手环真的能精确测出你的卡路里消耗量

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  Fitness bands like the Apple Watch and the Fitbit aim to track your vitals,like heart rate.But early models weren’t all that accurate."We thought of them a little bit like random number generators.They really didn’t seem to be providing anything that bore any relationship to heart rate."Euan Ashley,a cardiologist who studies wearables at Stanford University.
 
  苹果手表和Fitbit等运动手环的规划初衷是追寻你的生命体征,比方心率。可是运动手环的前期类型却并不那么精确。“咱们以为这些手环有点像随机数生成器。它们好像并没有供给任何与心率有关的数据。”斯坦福大学研讨可穿戴设备的心脏病专家尤安.阿什利说道
 
  He and his colleagues have now tested seven newer fitness bands—from brands like Apple,Fitbit and others—and he says those heart rate stats have gotten way better."Yeah we were pleasantly surprised actually by how good the accuracy of the heart rate monitoring was."
 
  现在,他和搭档现已测试过苹果、Fitbit和其他品牌的7种新式运动手环,他表明,所监测到的心率数据精确多了。“是的,咱们对运动手环的心率监测精确性居然如此之高感到惊喜。”
 
  For most of the devices,the error rate was less than five percent—good enough for your doctor.But where all the devices failed to measure up was estimating calories burned.Even the most accurate devices were off by 27 percent,compared to lab measurements of energy expenditure.One device was off by more than 90 percent.
 
  大多数手环的错误率小于5%,对你的医师来说这满足好了。可是,在预算卡路里耗费值方面,一切运动手环都不合格。与能量耗费的实验室测量值比较,就连最精确的手环也有27%的差错。其间一个手环的差错率乃至超越90%。
 
  If you think about going to the gym and working out for an hour and maybe that’s around 400 calories,in reality that could be anything from 200 to 800.And that’s a big difference if you’re thinking about somebody who’s incorporating those estimates into their lifestyle and thinking about what to eat that evening based on the workout they did that afternoon.The results are in the Journal of Personalized Medicine.[Anna Shcherbina et al.,Accuracy in wrist-worn,sensor-based measurements of heart rate and energy expenditure in a diverse cohort]
 
  “假如你去健身房训练一小时,运动手环可能显现你耗费了大约400卡路里,但实际上你的耗费值从200到800卡路里都有可能。假如有人将这一数据融入其生活方式傍边,根据下午的训练状况来决议晚上吃什么,那就有很大差异了。”这项研讨结果宣布在《个性化医学》期刊上。
 
  The reason for the discrepancy,Ashley says,could be that we all burn energy at different rates—and that’s hard to reckon from simple input stats like weight and height."Some people are incredibly efficient and look incredibly elegant when they run.And others really clearly look like they’re burning a lot more calories to cover the same amount of ground."So if you own a wearable,it’s probably safe to trust the heart data.What it can’t tell you is whether your time on the treadmill really justifies that chocolate shake.
 
  阿什利表明,发生这种差异的原因可能是咱们焚烧能量的速率不同,并且这很难经过身高体重这类简略的输入数据预算出来。“有些人跑步时很高雅,并且还能高效地焚烧能量。而其别人跑步时则很吃力,虽然是跑相同的里数,但看起来却耗费了更多的卡路里。”因而,假如你有可穿戴设备,它可能会供给安全可信的心率数据。但它无法通知你的是,你在跑步机上的训练是否能耗费掉那杯巧克力奶昔的热量。
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