Downside of Lifewave X39 & X49?

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Trail talk of a possible downside of the use of the Lifewave X39 and X49 patches for the older athlete while training for the Leadville Marathon.

Summer of 70 highlights: https://studio.youtube.com/video/7-FVRfe1nS8/edit

for more information on Lifewave: https://lifewave.com/BruceLundie

Lifewave Downside UPDATE: https://www.youtube.com/watch?v=xrKga4llN9c&t=4s

Shop at the Gain Cave Store: https://www.etsy.com/shop/GAINCAVE?ref=seller-platform-mcnav
Lets go get it