Might help with the high notes, but what concerns me is his shortness of breath.

Ever since I watched the Target show video I've wondered if there isn't a pulmonary or respiratory issue. From all accounts, Jon works out regularly, so it's not that he's simply out of shape; but in that show he couldn't finish a single line of Bad Medicine without skipping words to grab for air.

Maybe that's why he stands behind the mic so much. He doesn't have the wind to move around a lot AND sing, so he has to choose.

It might also explain his remark at the BB King Runaway show when he first started talking about the new album and said the band might go out again in February... "depending on everyone's health and well-being".