HBLB Racehorse Health

Effects of athletic training on the equine heart: 
Do horses with big hearts run faster?

Lesley E Young, Katherine Rogers and James LN Wood

Heart size matters
HBLB funded research showed that if a racehorse, especially a jumper, has a large heart, it has a significant advantage due to superior oxygen supply. Eclipse, Phar Lap and Secretariat all had large hearts.

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