I think it's more complicated based on the article: > "...It’s a very specific movement that right now requires wearable technology and experience to optimize

I think it's more complicated based on the article: > "...It’s a very specific movement that right now requires wearable technology and experience to optimize the health benefits.” So it sounds like the performer may have to look at a graph to see that the right motion has been achieved? This video reinforces the notion: https://www.youtube.com/watch?v=yaK6TThRMdE https://www.youtube.com/watch?v=yaK6TThRMdE