Joe guy is a Longrider. One of only a few, He has rode across Australia across and up and down. He has also done about 5000 miles in the USA and I think around 4000 in Canada I think.
He rides horses that other have given up on, some have been standing around for years after they had been deemed un-rideable.
We were working in our indoor round pen which is notoriously dusty and most of the time there was no dust and the horse wasn't sweating. if they did it was more from nerves than exertion.
To learn more Google "Joe Guy Brewer".