I'm riding and training a 5 yo pony gelding. He is about 3.51 ft and as far as I can see, he is quite sound. The only thing is that he is overweight.
He's a speedy little guy that loves to gallop, when I ride him. To be honest I'm often impressed by his endurance and speed. However, after a long gallopp he's short of breath and it takes at least 10 minutes till his breath is absolutely normal again (absolutely normal = like before work). He also tends to sweat on his chest, but never on his back (where the saddle is).
He has been ridden for about half a year now, on average 2 times a week.
Everybody keeps telling me, that I'm not to heavy for him, and I also think so (because he is relaxed and spirited, when I ride him) but could his "being out of breath" be a sign for a too heavy rider? (I'm weighing about 99 lb, and I'm about 5.1 foot high).