Killermike, you bring some good stuff here, but you seem to think that by calling careful self-observation and reporting "anecdotes" you show that it is useless and tells us nothing. However, a) most research studies involving exercise are small in number and often problematic in many ways, leading to contradictory claims, and b) the high mileage runners are a select group and hard to get into a study, so this provides a good start. If there's no lab coat, that doesn't mean we do not observe and report as well as or better than and certainly more punctually than the study authors. For instance, we might wait years for the report to conclude something about achilles drops or try it out and see what works. The practitioners get it right long before the study authors who generally don't know much about what they are doing. Also, if you see trends in reports, then that gives researchers a good question to examine.