Happy April Fool’s! Not a joke video – content starts at 0:49. This video is about heart rate variability’s connection with willpower.
The Book I mention: “The Willpower Instinct” (http://amzn.to/2nscOip)
emWave2 is quite pricey but has been a reliable HRV Monitor: ( http://amzn.to/2mZZhTL)
I have been using this for a while now just to improve stress and somewhat measure whether or not my meditation practice is being effective. I didn’t make the connection between HRV and willpower until reading Kelly McGonigal’s book