One of the most demanding parts of racehorse training is initial training for 2yos. At this time, they are most prone to damage and most likely to be ruined for full development of their athletic potential, whatever that may be.
One blog that takes a different tack on training racehorses is The Science Racehorse Training, which features a post on the best program for developing a 2yo for racing soundness, using the Maryland study approach to modified training. Read it here.
This approach to training early 2yos is generally well-regarded but far from universally applied. Personally, I find this very interesting and would welcome comment on the process from those training young stock or older horses.
It seems to me that we are approaching a level of knowledge that could allow our better athletes longer careers at or near their optimum performance. I appreciate all informed commentary on this important topic.