The first is a treed icelandic-style saddle. The lowest part of the seat is further back, putting the rider in a chair seat, which places most of the weight behind the action of the horse (center of mass), and on the weakest part of the horse's back.

This is a treeless western-style Sensation saddle. The rider will be aligned more with the horse's COM (center of mass). Even though the saddle ends past the last rib, since it's treeless, it's not a problem (there won't be anything digging into the loins), and the center of saddle (the low point) appears to be well forward.

Icelandic Horse Connection
You might consider the concussion on the spinal processes riding in a treeless saddle
ReplyDeleteconsider the concussion to the spinal processes from riding treeless
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