We previously reviewed a study on magnesium supplementation in volleyball players who were not deficient. That was in episode 297. Today we are back at it again and once again it seems there may be something to supplementing with this mineral. John always reviews the full-text of every article, but you may view the free abstract by clicking here: http://www.jissn.com/content/pdf/s12970-015-0081-z.pdf .