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[RC] Speaking of hearts - Sharon Hahn

In response to the post about why 2 horses would have different "cruising" heart rates given the same conditioning and same terrain -

In addition to natural ability of the cardiovascular system, biomechanics probably has something to do with it.  I would think a horse with an efficient gait expends less energy than one who tools along with feet swinging out in 4 different directions.  That's why human track runners worry about proper form.  Terrain has something to do with this as well:  a horse that naturally has a more high-stepping gait will probably do better in deep sand or rocky terrain that one with a "daisy-cutter" stride, even though the daisy-cutter might be more efficient on firm, level terrain.

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