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First off, adrenaline is not so much of an issue at the finish--it is a HUGE issue at the first vet check.  And guess what--it increases heart rates.  So no, "adrenaline" per se is not causing the marginally injured horse to look less injured, when his heart rate is down and he is munching hay.  So that dog don't hunt.

 

Second, how did the horse with the "naturally longer recovery curve" get through all the vet checks that required him to be down in half an hour?  He is still the same horse at the finish line, and if he has been ridden within his capacity, his "recovery curve" should be the same.  In fact, if it isn't, it is a sign that he has been overridden--all the more reason to be concerned if he takes over half an hour to recover.  You've just presented one of the arguments FOR having a 30-minute cut-off post-ride, IMO.

 

Third, yes, there would be merit in requiring pulse recovery within 30 and the biomechanical exam later.  But one of the arguments consistently put forth has been not wanting to put an undue burden on ride personnel and vets.  Having to examine each horse twice instead of once would be a staff burden--but at least that suggestion has merit.  Given a choice of one or the other, I would still rather see the horse be required to pulse down quickly and take the risk that there may be a biomechanical problem brewing that I might miss.  Metabolic failure can result in emergency and sometimes acute death--biomechanical problems can often be sorted out hours later or even in the next day or week without putting the horse in undue jeopardy.

 

Fourth, CRI's on the non-recovering horse would be interesting, certainly.  But a horse with an 80/80 CRI is still in trouble.  Don't forget that absolute recovery and the CRI are both valuable indicators.

 

Heidi

-------- Original Message --------
Subject: Re: [RC]   30 Min Rule
From: Lynne Glazer <lynne@xxxxxxxxxx>
Date: Sun, January 07, 2007 12:52 pm
To: Diane Trefethen <tref@xxxxxxxxxxxxxxxxxx>
Cc: Ridecamp <ridecamp@xxxxxxxxxxxxx>

I snipped your post in this reply to save the digest folks, but I  
agree with every single point and proposal you made.  Thanks so much  
for expressing my views so clearly.  ;-)

Lynne

On Jan 7, 2007, at 10:03 AM, Diane Trefethen wrote:

>
> Your comments on adrenaline highs, though valid, beg the issue.  Yes I
> mis-spoke; it is the endorphins, not adrenaline, that mask the  
> pain.  My
> point wasn't that ADRENALINE is a problem but that every excited horse
> produces a natural anaesthetic which masks lameness and other general
> discomfort, like the beginning of a colic.  A 30 min limit wouldn't  
> catch
> the jazzed up horses who have a bruised tendon but would nail the  
> horses
> with a naturally longer recovery curve.
>
> Good suggestion:
> "Maybe a compromise to your suggestion of a vet check between 30  
> and 60
> minutes could include a pulse recovery before 30 minutes, and a  
> lameness
> eval between 30 and 60 to detect those horses that were indeed  
> running in
> pain?"
>
> Great suggestion:
> "An interesting test would be to perform a CRI on any horse that isn't
> recovered by 30 minutes and see if he passes."  In conjunction with  
> the 45
> min and one hour re-checks, this could be an excellent tool for the  
> vets
> and riders to zero in on a horse with incipient problems... and  
> yes, lead
> to a dq on occasion.
>
> Sincerely yours,
> Prof Stork


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