It's not new research. It's several years old.
It's also why I'd like to see breeders start putting some interest breeding back to a more robust horse vs just looking for something that can look good at a show. Some breeds are becoming physically (structurally if you prefer) weaker than the breeds was originally developed to be. I've actually seen some of the effects in TWH and ASB in my lifetime. All the TWH I was around in the early 1970's were more robust than most of the once I've seen recently. I think the ASB were already less robust at that time, which is why we had TWH instead. It's not true of all breeds, but I notice it in some. But that's not to say that there aren't some of these breeds that still have wonderfully robust animals. They just appear to be less common. It could be that breeders wanted to breed to a lighter horse. Perhaps they do better in competition. I can't say, since I competing is not something I've ever had an interest in doing. And I'm not saying that it's bad to breed to a competative standard. It's all about what is desired. I desire a strong, robust horse with strong bone and muscle structure. And a nice easy gait (now that I'm a "few" years older :)) )