研究人員近日指出,，就監(jiān)測(cè)心率的準(zhǔn)確度而言，佩戴在手腕上的商用健身追蹤器還不能比擬專業(yè)的胸貼式監(jiān)測(cè)儀,。商用健身追蹤器的心率讀數(shù)可能要高于或低于實(shí)際心率,，這取決于佩戴者的活動(dòng)劇烈程度。

總體來說,，腕式監(jiān)測(cè)設(shè)備給出的心率值,，一般在休息時(shí)測(cè)得較準(zhǔn)，而在運(yùn)動(dòng)時(shí)誤差較大,。

該研究的主筆人之一,、克里夫蘭醫(yī)院醫(yī)生馬克·吉利諾夫表示：“如果有人想知道自己的準(zhǔn)確心率，比如確實(shí)有這種需要的心臟病人或?qū)I(yè)運(yùn)動(dòng)員,，他們最好還是使用胸貼式監(jiān)測(cè)儀,。”

吉利諾夫通過電話對(duì)《路透健康》表示：“如果你使用的是腕式監(jiān)測(cè)器,，而且它給出了一個(gè)很高或很低的數(shù)值,，這個(gè)數(shù)值有可能是錯(cuò)誤的，所以不必?fù)?dān)心,?！?/p>

吉利諾夫還指出，人的運(yùn)動(dòng)狀態(tài),、背景光線甚至是膚色都有可能對(duì)腕式監(jiān)測(cè)器的準(zhǔn)確度造成影響,。

研究人員對(duì)四種心率監(jiān)測(cè)儀進(jìn)行了研究，50名健康的青年人參與了這項(xiàng)研究,。他們要佩戴著心率監(jiān)測(cè)器在跑步機(jī)上跑步,。他們的四肢連著心電圖導(dǎo)聯(lián)電極，胸口連著一臺(tái)Polar H7胸貼式監(jiān)測(cè)儀,，用于心率數(shù)據(jù)的對(duì)比,；同時(shí)他們還佩戴著四種不同的腕式監(jiān)測(cè)器中的兩種，包括Fitbit Charge HR,、蘋果Apple Watch,、Mio Alpha和Basis Peak,。

研究人員收集匯總了被試者在休息狀態(tài)下以及在跑步機(jī)上以每小時(shí)2英里、3英里,、4英里,、5英里和6英里奔跑時(shí)的心率數(shù)據(jù)。被試者要分別以以上速度奔跑3分鐘,，然后才開始記錄其心率數(shù)據(jù),。被試者的心率數(shù)據(jù)從每分鐘49次至200次不等。

與最精確的心電圖數(shù)據(jù)相比,，其它心率監(jiān)測(cè)器在精確度上都是有差異的,。首先是目前已經(jīng)全面退市的Basis Peak，在輕度運(yùn)動(dòng)狀態(tài)下,，它的讀數(shù)比實(shí)際心率每分鐘高出約8次,。其次是Fitbit Charge HR，它在激烈運(yùn)動(dòng)中的讀數(shù)要比實(shí)際心率每分鐘低6至7次,。

據(jù)《JAMA心臟病學(xué)》雜志報(bào)道,，在95%的情況下，蘋果的Apple Watch和Mio Fuse的讀數(shù)都處在心電圖讀數(shù)上下不超過每分鐘27至29次的范圍內(nèi),，這個(gè)誤差要略低于Fitbit和Basis Peak,。

吉利諾夫還指出，那些腕式健身監(jiān)測(cè)器的生產(chǎn)廠商自己也沒有把它們的產(chǎn)品稱作醫(yī)療設(shè)備,。

他表示：“它們不應(yīng)被用于診斷或治療任何疾病,，在那種情況下，你也不能指望它們,?！?/p>

Fitbit的長(zhǎng)期臨床研究伙伴、Fitabase公司創(chuàng)始人兼CEO亞倫·科爾曼也對(duì)《路透健康》表示,，他認(rèn)為實(shí)驗(yàn)結(jié)果還不算太差,，尤其是考慮到這些腕式設(shè)備的對(duì)比對(duì)象是研究級(jí)的設(shè)備。胸貼式心率監(jiān)測(cè)儀雖然結(jié)果很精確,，但對(duì)于非專業(yè)運(yùn)動(dòng)愛好者來說,，佩戴起來顯然是很不便的。

他最后表示,，總的來說,，心率監(jiān)測(cè)器的佩戴位置離心臟越遠(yuǎn)，其讀數(shù)的誤差也就越大,。（財(cái)富中文網(wǎng)）

譯者：樸成奎

審校：任文科

Commercial fitness trackers worn on the wrist are less accurate than a chest strap monitor at measuring heart rate, and may over- or underestimate heart rate depending on activity level, researchers say.

In general, wrist monitors are more accurate at rest than during exercise.

“If somebody must know his or her heart rate with great accuracy, like a heart patient or a trained athlete, if you really need to know, use a chest strap,” said co-author Dr. Marc Gillinov of the Cleveland Clinic.

“If you’re using these wrist worn monitors and you get an odd value, way too high or too low, it’s probably wrong so don’t be concerned,” Gillinov told Reuters Health by phone.

Motion, ambient light and varying skin tones can all affect wrist monitor accuracy, he said.

The researchers studied four heart rate monitors worn by 50 young, healthy adults exercising on treadmills. They wore electrocardiographic (ECG) limb leads and a Polar H7 chest strap monitor as comparisons for heart rate data, and also wore two of the four different wrist monitors: Fitbit Charge HR, Apple Watch, Mio Alpha, and Basis Peak.

Heart rate readings were collected at rest and on the treadmill at two, three, four, five, and six miles per hour. Users exercised at each level for three minutes before heart rate was recorded. Recorded heart rates ranged from 49 to 200 beats per minute (bpm).

Compared to the ECG, the heart rate monitors had variable accuracy. The Basis Peak, which is no longer commercially available, overestimated heart rate by roughly eight bpm during moderate exercise. The Fitbit Charge HR underestimated during more vigorous exercise, by about six or seven bpm.

The Apple Watch AAPL -0.07% and Mio Fuse had 95% of their heart rate readings fall within a range of 27 to 29 bpm over or under the ECR reading, a slightly smaller range than the Fitbit or the Basis Peak, as reported in JAMA Cardiology.

The companies that make the wrist monitors do not claim that they are medical devices, Gillinov said.

“They should not be used to diagnose or treat anything, you can’t count on them in that context,” he said.

Aaron Coleman, CEO and founder of Fitabase, Fitbit’s FIT 0.00% longtime clinical research partner, told Reuters Health he thinks the results aren’t too bad, especially considering the wrist-worn devices are being compared to a research-grade device, a chest strap that would be unwieldy for any casual athlete to wear.

In general, the further away from the heart a body monitor is located, the more variation there will be in heart rate readings, he said.