It's amazing what fascinating facts you can glean from the radio when up at 6am feeding your baby!! But apparently Beetroot juice as well as being the latest easily obtainable panacea, is particularly good at increasing oxygen capacity in the body. Free divers have been tested with a placebo and the real stuff and were discovered to be 11% better. So logic would have to say the potential benifits for Brass Players is well.......interesting if nothing else!! http://www.belfasttelegraph.co.uk/n...ce-helps-you-hold-breath-longer-16163649.html Having said that.....having witnessed the occasional thick atmosphere in the band room ( I sat next to Dean Morley for a number of wonderful but fairly pungent years!!) the implications for carbon monoxide poisoning in a 2 hour rehearsal are somewhat frightening!!!