Episode 19：有能量的人 (To be a person)

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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

Host

• MilkShake羊

Sound Editor

• Kalaokay

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