Energy/Hologram sport bracelets

I am a runner and I have seen interest expressed by online friends about "energy bracelets" or "hologram bracelets" which used to be marketed by Power Balance and now (in Europe) are also sold by Mojo Future Tech. I am aware that Power Balance was required some years ago to remove their earlier claims of efficacy.

Anyone aware of any decent debunking resources? Thanks

via International Skeptics Forum http://ift.tt/1Uauwpu