Last Oct I worked the P&R for a FL ride. It was hot and humid on that
ride. Just about every horse that came in was panting. It didn't seem to
impact there recoveries much. I had horses come through at 44 and 48 by the
time the riders got their selves together and cooled off.
So I don't believe this to be a valid observation. But one thing to remember
on a panting horse is they need more electrolytes.
The 'panters' seemed to have higher heart rates as a general rule.