TGJB,
I actually agree with you completely. I have a soft spot for the great horses of the late 70s. (and Dr Fager in the 60s) :-)
I\'ve engaged in an endless number of debates about Ruth, Gehrig, Cobb, Joe Louis, Rocky Marciano, Nicolas, Tiger etc...
However, I suspect the changes in most competitive human sports like boxing, baseball, golf, tennis, etc... are much more complex to analyze because there have been huge advances and changes in equipment, stadiums, courses and rules that impacted the game and the stats too.
Track and field is very clear though. People are faster.
Since there\'s almost no question at all there have been huge advances in human training, nutrition, etc.. since the 20s it\'s hard to argue with you about Ruth.
However, how about if we just go back to the time of Mays, Mantle, and Aaron which is more in line with the horses I mentioned? Then it\'s a little tougher (let\'s exclude steroids as a factor)
I guess there have been training and nutritional advances for horses in just the last 30 years, but I\'d still take Spectacular Bid as a 4YO over Mineshaft. :-)