Hologram bracelet

[7] The holograms are most usually installed in bracelets and wristbands but are also sold as pendants or necklaces, anklets, shoe inserts, pet tags, or separately for users to apply to the back of a watch, for example.

[11] In December 2010, following a successful legal action by the Australian Competition & Consumer Commission, Power Balance admitted that there was no credible scientific evidence for these claims.

Footballers David Beckham[2] and Cristiano Ronaldo[3] have worn them, and tennis players Sam Querrey and Mardy Fish both wore them during the final of the 2010 Queen's Club Championships.

A 2011 study by RMIT University's School of Health Sciences found that there was an overall decrease in the balance and stability of wearers, although it was not statistically significant and the overall conclusion was that the bracelets had no effect on performance.

[3] Research by the University of Wales Institute, Cardiff, commissioned by the BBC, also found that wearing the bracelets had no effect on performance in standard sports industry tests, adding that neither the physiology or the biology of wearers was changed.