Christa Lesté-Lasserre, MA

Passionate about horses and science from the time she was riding her first Shetland Pony in Texas, Christa Lesté-Lasserre writes about scientific research that contributes to a better understanding of all equids. After undergrad studies in science, journalism, and literature, she received a master’s degree in creative writing. Now based in France, she aims to present the most fascinating aspect of equine science: the story it creates. Follow Lesté-Lasserre on Twitter @christalestelas.

Articles by: Christa Lesté-Lasserre, MA

Fair Play: World Equestrian Games

For decades the Federation Equestre Internationale (FEI) has governed major international equestrian events with the objective of keeping the sport fair and drug-free–an initiative the FEI refers to as “Clean Sport.” Recently, however, the FEI revamped its system and put its new Equine Anti-Doping and Controlled Medication Regulations (EADCMR) into place. This overhaul occurred in response to

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FEI Debates Use of NSAIDs in Competing Horses

The most commonly used non-steroidal anti-inflammatory drugs (NSAIDs) in equine medicine are relatively safe, effective, and short-lived at low doses, but their use could mask lameness or other ailments in competing horses, according to international scientists at the recent NSAIDs congress hosted by the Fédération Equestre Internationale (FEI). Whether NSAIDs should

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Saddle Tree Types and Pressure Distribution

Modern saddles provide new options for tree type, with the goal of sparing a horse pain from localized saddle pressure. But new Swiss research suggests that, at least when a horse trots, tree type makes little difference in pressure distribution along the horse’s back.

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FEI Proposes Prohibited Substances List Modification

Some non-steroidal anti-inflammatory drugs at low therapeutic levels might be helpful for horses with inflammation between competitions, so clearer and more current information is needed about detection times for anti-doping testing, according to a Fédération Equestre Internationale (FEI) committee. This committee–the FEI List Group–maintains the official list of controlled and prohibit

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“Conflict Behavior” Evaluation Varies Among Horse Professionals

There’s a new term that describes the actions of our horses in response to our unclear cues or handling: “conflict behavior.” Horses showing conflict behavior might buck, rear, toss their heads, gape their mouths, or try to escape their handlers, to name a few examples, and they might get labeled with adjectives such as “stubborn” or “naughty.”

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Piroplasmosis: Searching for Answers in Europe

The number of piroplasmosis-positive horses imported from Europe varies considerably from one country to another, according to new findings by Swiss researchers. With piroplasmosis steadily creeping across the globe in the 21st century, spreading out of its once traditional tropical/subtropical regions, these researchers have been looking into prevalence statistics to better under

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Training: Food Rewards Are More Effective Than Physical Contact

Everybody loves a good back scratch, including your horse, right? Scratching of the withers has been scientifically proven to reduce a horse’s heart rate, but a good scratch might not be enough to communicate to your horse that you’re happy with what he’s just learned and that you want him to do it again next time. According to new research by French equitation scienti

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Seeking Solutions to Separation Anxiety

When teaching young horses to accept separation from their pasturemates, it might seem like a good idea to train them in pairs first for a while before training them alone. However, new equitation science research suggests that pairing them up might just delay the anxiety of separation and, in the end, the results of this method don’t differ much from those of immediate individual separation.

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NSAIDs Congress Exposes Benefits and Risks, Focuses on Horse Welfare

Scientific, legal, and ethical points of view on non-steroidal anti-inflammatory drug (NSAID) use in competition horses continued to stream Switzerland’s air even at the close of the two-day NSAIDs congress, hosted by the Fédération Equestre Internationale (FEI) in Lausanne. Although no consensus was reached,

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Bilateral Training Improves Performance, Welfare, Researchers Say

Congratulations, your horse has learned a new trick! Now, start all over again–this time on the other side. That’s right; it turns out if you want your horse to learn a trick or skill correctly, you’re probably going to have to teach with cues that are visible to the horse from both sides of his head. According to new equitation science research, what a horse learns on hi

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FEI NSAID Congress Convenes in Switzerland

The future of non-steroidal anti-inflammatory (NSAID) use in international equestrian competitions is currently under open debate in an unprecedented two-day congress hosted by the Fédération Equestre Internationale (FEI) in Lausanne, Switzerland. This “long-awaited” event on Aug. 16 and 17 provides a forum for an organized and scientifically informed debat

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Smaller Endoscopes Lead to Less Invasive Navicular Treatment

A novel twist to an existing surgical procedure is creating new opportunities for healing a long-recognized form of lameness, according to Italian researchers. Palmar foot pain (a modern term for navicular syndrome) cases are now being treated with e

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Study: Rein Tension Varies Between Riders, Affects Horses’ Gaits

You know what it means to apply light contact with the bit, but have you ever wondered if your interpretation is the same as other riders’? And how strong is “strong contact,” exactly? What kinds of effects do these different hand movements have on your horse–particularly his stride? These questions are what a couple of England-based equitation science researchers

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Spatial Reasoning and Laterality Affect Riding Horses’ Behavior

“Can’t go over it, can’t go under it, have to go around it.” No, your horse isn’t on a bear hunt; he’s on a bucket hunt, trying to reach his food around an experimental barrier. Italian equitation science researchers set up this obstacle game to see how horses respond to the next question: “Around it, yeah, but which way?” Whether horses go right

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New Foal Immunity Research Brings Hope for Improved Prevention Methods

A foal’s immune system is known to be weak and immature, but new cell-based research suggests that “immunodeficiency” might be too broad a term to define the disease-fighting capacity of the youngest horses. The research is overturning old theories about foal immunity, which could soon lead to improved disease prevention methods and more effective treatments for sick

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Once-Paralyzed Foal Now Walking Freely

Vitelle, the once-paralyzed filly, is finally walking, trotting, and cantering without a walker at the farm in Belgium she left more than a year ago. In June 2009, at 3 weeks old, the Boulonnais Draft horse foal developed sudden paralysis and urinary incontinence. Three days later she underwent a groundbreaking surgical laminectomy at a Belgian veterinary school to remove a cyst from her spinal co

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