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[翻译]Technology Report - Study: Fitness Trackers Accurate for Heart Rate, Not Calories

更新时间:2017/6/1 8:43:27 来源:本站原创 作者:佚名

If you think your fitness tracker on your wrist is giving you a good excuse to eat that sweet treat, you may want to think again. A recent study from the Stanford University School of Medicine says fitness trackers are not accurate at tracking calories. The study says, however, that the trackers are accurate at measuring heart rate.

如果你认为手腕上的健身追踪器能让你有借口吃甜食,你可能还需三思而行。斯坦福大学医学院最近的一项研究表明,健身追踪器不能准确跟踪卡路里。但是该研究称,这些健身追踪器可以准确测量心率。

The Stanford researchers examined measurements recorded when people were at rest and while they exercised.

斯坦福大学的研究人员调查了人们在休息和健身时记录下的数据。

“People are basing life decisions on the data provided by these devices,” said Euan Ashley, one of the study investigators.

研究人员之一的Euan Ashley表示,“人们根据这些设备提供的数据做出生活方面的抉择。”

The study looked at seven fitness trackers worn on the wrist:

这项研究考察了七种戴在手腕上的健身追踪器:

They were Apple Watch, Basis Peak (version 1), Fitbit Surge and Microsoft Band (version 1). The others three were Mio Alpha 2, PulseOn, and Samsung Gear S2.

其中包括Apple Watch,Basis Peak(version 1),Fitbit Surge和Microsoft Band (version 1),另外还包括Mio Alpha 2,PulseOn和Samsung Gear S2。(注:以上为各公司出品的智能手表或手环)

Sixty participants of both sexes wore up to four trackers on their wrists as they sat, and as they exercised on a treadmill and a stationary bike. The participants were a mix of sizes and fitness levels.

60名男女参与者在他们坐立以及在跑步机和健身单车上锻炼时,手腕上佩戴了高达4种健身追踪器。这些参与者的体型和健身水平各不相同。

The trackers measured the heart rates and energy used, or calorie burn, in activities from sitting to a slow walk to a run. They also tested people cycling at different speeds.

这些追踪器测量了从坐立到慢跑再到跑步这些活动中的心率和热量消耗(卡路里消耗)。他们还对以不同速度骑车的人们进行了测量。

Professional medical instruments measured participants’’ heart and breathing rates as well as temperature and blood pressure. The researchers compared the fitness tracker measurements to those of the “gold standard medical instruments.

专业医疗器材测量了参与者的心率、呼吸频率以及体温和血压。研究人员将健身追踪器的测量数据跟这些“黄金标准医疗器械”进行了比较。

Energy expended (EE)

The final report on the study was published last week. It found that none of the trackers met what researchers considered an acceptable error rate for energy use measurement. The acceptable error rate is five percent or less.

这项研究的最终报告于上周发布。研究发现,这些健身追踪器都不满足研究人员测量热量消耗时可接受的误差率。可接受的误差率是5%以下。

The researchers wrote that the Fitbit Surge was the most accurate tracker of energy use. It had a 27.4 percent average error rate. The study found the PulseOn to be the least accurate tracker, with a 92.6 percent error rate.

研究人员写道,Fitbit Surge追踪热量消耗最为准确,它的平均误差率是27.4%。该研究发现PulseOn最不准确,其误差率是92.6%。

The error rate was higher for males than for females with all fitness trackers tested. The average error rate for all the trackers studied under all forms of exercise was four percent higher for males than for females.

所有测试健身追踪器对男性的误差率高于女性。在各种形式运动下进行研究,所有追踪器对男性的平均误差率比女性高4%。

Heart rate (HR)

The good news is the tested fitness trackers were accurate at measuring heart rate. All but one of the trackers met the acceptable error rate limit in heart rate measurement.

好消息是,接受测试的健身追踪器在测量心率方面是准确的。除了一款健身追踪器之外,其它所有健身追踪器都满足了心率测量的可接受误差率限制。

Of the trackers studied, the Apple Watch was the most accurate at measuring heart rate, with an average error rate of two percent. The Samsung Gear S2 was the least accurate with an average error rate of close to seven percent.

在这些追踪器中,Apple Watch在测量心率方面是最准确的,平均误差率是2%。Samsung Gear S2在测量心率方面是最不准确的,平均误差率接近7%。

Study findings

For both the measurement of energy used and heart rate, the researchers said “the Apple Watch had the most favorable error profile while the Samsung Gear S2 had the least."

研究人员表示,对能量消耗和心率两种测量来说,Apple Watch拥有最有利的误差文档,而Samsung Gear S2最不利。

More information

The Stanford researchers are continuing their investigation of fitness trackers. Next, they will test participants wearing fitness trackers during their daily lives and while exercising outside a laboratory.

斯坦福大学的研究人员还在继续调查健身追踪器。下一步,他们将在日常生活和实验室以外进行运动时对佩戴健身跟踪器的参与者进行测试。

The full study is available online at The Journal of Personalized Medicine.

完整研究可以在《个性化医学杂志》的网站上找到。

I’m Caty Weaver.

Words in This Story

fitness tracker - n. a wearable device or a computer application that records a person’s daily physical activity, together with other data relating to their fitness or health, such as the number of calories burned, heart rate, etc.

accurate - adj. able to produce results that are correct

calorie ​- n. a unit of heat used to indicate the amount of energy that foods will produce in the human body

stationary ​- adj. not moving : staying in one place or position

error ​- n. something that is not correct

profile ​- n. a brief written description that provides information about someone or something

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