Why is it tough for a horse to run three ~1 mile races within 5 weeks to win the triple crown (Kentucky Derby, Preakness, Belmont)?
Perhaps I don't understand horse physiology verse human physiology but why is this the case? Humans can run many miles per day while training and/or can run a 1-2 mile race once or twice a week (well, my friends did in HS for track and field).
EDIT: Here's an article that shows the owner complaining the field was stacked with fresh horses against his "tired" horse but again, for a horse to run three 1 mile races in 5 weeks, fatigue shouldn't be an issue unless I'm totally off regarding horse vs. human physiology.