Really interesting article Mike, thanks for posting it. My take on it would be that it makes some assertions which aren't referenced and may not be true.
For example the article says that "
Negative lung loading has been shown to create more hypoventilation and fatigue.than positive lung loading, which creates fatigue only. The rule is, positive lung loading is better than negative lung loading, but low hydrostatic lung loading and the reduction of lung loading variances are best of all" In a very quick and dirty look I could only find one reference in the medical literature that addresses the issue, from 1979 in Undersea Biomedical Reserach. http://www.ncbi.nlm.nih.gov/entrez/q...st_uids=524528 The authours could not demonstrate any significant effect of static lung loadings from -20 to +20 cm of water on a range of ventilatory parameters at submaximal and maximal exertion. There is some (largely anecdotal) evidnece that it is exhale resistance/work that contributes to rapid/shallow/ineffective respiration in divers suffering from CO2 toxicity. Exhale resistance is higher with the counterlung deeper than the chest. So where does that leave us? Dunno. Thanks again for posting it here, I was going to reply on TDS but then I thought - best let it through to the keeper
Dave T