Join Date: May 2011
Location: Chino Valley, AZ
Tied in behind the knee refers to the tendon that runs down the back of the canon being smaller in diameter at the top (below the knee) than it is at the bottom (above the fetlock). It gives the appearance of the leg being cut in behind the knee, instead of straight and parallel, as it should be. Being tied in behind the knee affects mostly speed events (barrels, poles, etc) and concussion events (jumping, endurance, etc). It limits the strength of the flexor tendons that are necessary to absorb the shock and diffusion of impact through the legs, making the horse prone to tendon injuries. The leverage of muscle pull is decreased as the tendons pull against the back of the knee rather than a straight line down the leg. This reduces speed and power. Horses that are tied in behind the knee are best suited to sports that shift the weight to the rear, like dressage, driving and cutting.
I wouldn't say Luna's is bad enough to severely limit what she can do, it's just something to keep in mind as she gets older and is used more. Knowing your horse's faults, regardless of how minor, is always a good idea, so you can know what to look for as they age and know how their conformation affects their performance and usability, as well as knowing how to protect them from injury.
Do not tell me I can't...because I will show
you that I can.