[QUOTE=Gestalt;8944225]
Why do people, especially big name trainers, ride lame horses?
That poor thing is so obviously lame, geezus.[/QUOTE]
IMO, the horse is going short behind (I only watched the first two or three minutes, until the horse got more warmed up) but isn’t head bobbing lame. The way this horse is going, is IME typical of shorter-strided horses (like quarter horses) who are being ridden crooked and under tempo. Notice that at the canter, the horse can’t go around a corner bent; it is cornering with the haunches in, head out, almost going sideways: not a true haunches in, just very crooked and unbalanced. The horse has adequate hock articulation after the first minute or so, so the hocks aren’t ruined (yet). I would call this horse “rein lame,” in that the riding is hampering the horse from moving correctly.
The rider isn’t doing anything super-horrible in the parts of the video I watched, it’s more that he clearly either has no tools in his toolkit to fix these problems, or else doesn’t even see them as a problem.
Going short behind is unfortunately true of a lot of Western riding, but you can also see it in bad dressage riding, and in bad hunter/jumper lessons on lesson horses. It absolutely does lead to true lameness in the hocks, stifles, and SI, and can lead to tendon injuries. But at the stage we are seeing here, I don’t think the horse is yet injured, just moving badly.
The Paint I am riding started out with a trot so short and disunited that she looked like an old school racking horse. Her front legs were flying much faster than her hind legs. In soft arena footing, photos didn’t tell much, but photos on hard ground show that she tends towards positive diagonal advanced placement at the trot (hind leg landing a fraction of a second before front leg), and that technically she would be verging on a foxtrot, not a rack. Anyhow, it took a lot of basic dressage schooling to get a correct diagonal trot, and to get balanced on circles and corners. If she had gone to a Western riding home, most likely no one would ever have done this work on her, because they would have only wanted a jog trot. They wouldn’t have bothered to push her and open up the trot.