Episode 19：有能量的人 (To be a person)

Apple Watch Series 4 Nike+ 上手和几代心率测量原理浅谈

Outline

新手表外观

Photoplethysmography (PPG)

Electrocardiography (ECG)

第一、二代

测量手腕血管内血液量的变化

基于 PPG

表背有两颗 LED

能耗问题

第三代

实时心率

基于 PPG 原理计算 Heart rate variability (HRV)

时域 (HKQuantityTypeIdentifierHeartRateVariabilitySDNN, the standard deviation of the interpulse intervals)

频域

Pulse rate variability

Health Data 开放给读者

Health-Account-Export Health Data

Github HRV Analysis Software

第四代

分别基于 PPG 和 ECG HRV

心电图体检

HRV 是个体差异的参数

Nike+特有的部分

Infograpg Module

Liquid 表盘

Vapor 表盘

Nike+ Run Club

Links

PPG

ECG

Heart rate variability

How to Measure Heart Rate Variability?

A comparison of photoplethysmography and ECG recording to analyse heart rate variability in healthy subjects

HRVAS: HRV Analysis Software

How Apple Watch measures your heart rate

How accurate is pulse rate variability as an estimate of heart

New Apple Watch Series 4 complications for ‘Infograph’ face: corner gauges, curved bezel text, more

Nike+ Training Club

Nike+ Run Club

当我谈跑步时我谈些什么

TRAINED

快速上手 watchOS 5，先从这些新功能开始

Episode 17：叫醒 Apple Watch 里的米老鼠

Byte Coffee