In all honesty, Amy (I hope I'm remembering your name right) I've not read anything specifically on it but I never seem to cough anything up during chest pt. Running (and sometimes the hypertonic) is the only thing that gets me to produce anything (and even that's not frequent). So yes, that statement was totally based on experience alone and I don't believe it can be applied to everyone. Though I'd be curious about any articles as well.
Okay, after a little searching I did find this, though as far as medicine goes it's fairly outdated but still has a valid result. <a target=_blank class=ftalternatingbarlinklarge href="http://adc.bmj.com/cgi/content/abstract/57/8/587">http://adc.bmj.com/cgi/content/abstract/57/8/587</a>
Okay, after a little searching I did find this, though as far as medicine goes it's fairly outdated but still has a valid result. <a target=_blank class=ftalternatingbarlinklarge href="http://adc.bmj.com/cgi/content/abstract/57/8/587">http://adc.bmj.com/cgi/content/abstract/57/8/587</a>