Interesting that studies are showing now for decades that starting a body early for whatever task it will have in life, horses, humans also, tends to give the most fit for the task body and mind.
Why some still insist to wait until the body and mind is so far into maturing to start training, when is clear that starting as soon as we may in proper ways for that stage is generally best?
Expecting an athlete to be good to maybe competitive against those that have been started early and studies have now shown that fitness for the task, here the horse as a riding partner, is best developed starting as early as it’s growth permits is best for a long, healthy life at that task.
Does it hurts to wait to start a horse later, more mature?
Not for just riding, but if we expect a horse to be good and stay sound for many years at a higher level of effort, that early start can give it an advantage that many are leaving at the table by waiting.
Think about this, your body growing up without a serious sport, then early adulthood you decide to take up basketball or tennis.
How much does your body has to then retool itself to accommodate the new task, how proficient will you ever get at it, compared with someone that has been in sports from very young? How apt are you to stay sound if you really exert yourself, compared with someone that grew up already primed for those tasks?
Just more to ponder.