Phone sensor predicts when Thoroughbreds will go lame

By guest blogger, Sue Palmer

I couldn’t help it, the title of the article caught my eye!

I don’t have full access to this article, which was published in 2010, but the basic premise is that attaching accelerometers to a horses neck could provide early warning of lameness.  I’d add that learning to listen to the horse more carefully, understand his behaviours, and become more aware of the feel of his movement, would all help.  Although the title could be taken as a bit of a joke, I do actually believe that using technology where it is useful is an excellent idea, and the reality is that if technology could provide early warning of lameness (i.e. if it could predict when a horse was just a little bit lame, rather than waiting until it’s hopping lame), then further more serious injury could in many cases be prevented.  It’s all very well to suggest that we listen to our horse, get to know him better, etc.  But as the saying goes, ‘common sense isn’t all that common’, and there’s a huge pressure to somehow develop ‘common sense’ around horses within a short time of owning your own, which in my mind is impossible unless you have been around horses for many years beforehand.  It’s impossible to know what ‘normal’ is if you only get to see / feel your own horse, or perhaps yours and a couple of friend’s horses, and that’s why it’s important to gather a team of experts (vet, physio, farrier, equine dental technician, saddler, nutritionist) around your horse to advise you.  When I was 32yrs old I studied for my Masters in Veterinary Physiotherapy at the Royal Veterinary College.  I had been riding since I was 3yrs old, working with horses since I was 12yrs old, and competing all my life.  And yet I still struggled to ‘see’ the asymmetries (sub clinical lamenesses) that others could apparently see.  I’ve developed this skill over the years watching literally thousands of horses move.  And even now I find it easier to trust my findings from ‘feel’ than from vision.  So actually I’m a great believer in the technology that has been and is being developed around measuring lameness in horses.  As a great friend once said, ‘If I can make it easier or better for my horse by ‘cheating’, then why wouldn’t I cheat?!’.


Many vets now have technology that helps them to assess lameness in the horse, and if you’re interested in applying the techniques to your own horse, why not give your local vets a call and ask them about it?

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Sue’s blog

The most recent edition of the Intelligent Horsemanship magazine (an excellent quarterly magazine for members of the Intelligent Horsemanship Association, included articles such as “Man or Machine: which comes out best?”, ‘Roadwork: Dr David Marlin gives us the facts”, “What is it with women and horses?”, an interview with Tim Stockdale, a plea to find the IH Young Equestrian Photographer of the Year, and one of my favourites, “Lameness: Are we looking at it all wrong?”. Client of The Horse Physio, Lisa and Chris Harrison, were featured with their horses Bluebell and Harvey, in the ‘IH Members Pictures’. the ‘In Other News’ section included a piece on microchips soon being the law for all horses in England if you want to avoid on the spot fines, and Lizzie Hopkison (of Ethical Horse Products, provided an excellent article on “Building a bond with your horse”, inspired by my book “Understanding Horse Performance: Brain, Pain or Training?”, explaining how to determine if your horse’s performance or behavioural problem is due to ‘brain’ (i.e. the horse is taking advantage of the owner), rather than pain (i.e. the discomfort the horse is feeling is leading to this behaviour) or training (i.e. the horse doesn’t understand what’s being asked of him).


The lameness article was written by Daisy Smith ( and consultant Dr Jessica Kidd MRCVS. They begin with a ‘lameness dictionary’:

Lameness / Unsoundness = an abnormal gait or stance of an animal that is the result of dysfunction of the locomotor system. In the horses, it is most commonly caused by pain, but could also be due to neurologic or mechanical dysfunction.

Mechanical Lameness: is caused by a physical abnormality, such as scar tissue, that prevents the normal motion of a limb. Mechanical lameness does not typically cause pain.

Poor performance: is defined as a situation in which a horse has had a decrease in performance levels, or one that has not reached it’s expected potential. Poor performance can be caused by lameness, but also respiratory and cardiac conditions.


Daisy and Dr Kidd discussed questions such as ‘Should we ride lame horses?’ (sometimes, yes, but the key is to get advice from a professional you trust), ‘What is lameness and is there mechanical lameness?’ (yes, there is mechanical lameness, but it’s uncommon), ‘In an ideal world all horses would be perfectly sound, but that is surely not realistic?’ (absolutely, and as people we’re not all sound either), and ‘If a riding school pony is not 100%, should it continue working?’ (perhaps, as the degree of lameness does not directly correlate to a pain scale).  The article is well worth reading.  In my work as an ACPAT and RAMP registered Chartered Physiotherapist, I’m often asked the question (usually by others on the yard who are concerned about a friends horse) whether it’s ok to ride a ‘lame’ horse.


My favourite definition of lameness comes from a talk I heard Sue Dyson give at the Saddle Research Trust conference a few years ago (don’t miss this year’s conference by the way,!).  She described lameness as “an asymmetry that can be changed with nerve blocks”.  Most horses (and most people!) are asymmetrical to some degree.  The question is whether that asymmetry is caused by pain – and if it can be changed by nerve blocks, i.e. by removing the pain, then clearly it’s caused by pain.  Finding and removing that pain can be another problem altogether, of course!


As a physiotherapist, I see plenty of horses who are very sore through their back, but their attitude does not indicate significant (or even any!) discomfort in their ridden work.  And I see other horses who are hardly sore at all on palpation and limb range of movement, but who are clearly saying they don’t want to work.  I specialise in figuring out whether the ‘I don’t want to work’ attitude is actually caused by pain, or whether the horse is taking advantage of his owner, or not understanding what’s asked of him.  I wrote ‘Brain, Pain or Training?’ ( so that you can figure this out for yourself.


So my overall answer to the question ‘Lameness – are we looking at it all wrong?’ I think is often ‘Yes’.  I think that some horses are retired due to lameness when they would happily keep working, and there are many physical and psychological benefits to exercise for people that can be assumed to transfer across to horses in my opinion.  And there are many more horses who are actually lame, but not recognised as being so.  The key, in my opinion, is listening to the horse, as well as having a trusted team around him to advise you.  Dr Sue Dyson is a pioneer in this field, and her Equitopia videos ‘Recognising subtle lameness’ ( and ‘Diagnosing subtle lameness’ ( are two of my all time favourites.  Every instructor, saddler, farrier, physical therapist, and all other equestrian professionals should have to watch those videos as part of their training, in my opinion.


Do you have a horse who is lame, but still in work? Have you retired your horse due to lameness? What can you share from your experience to help others who might be in a similar situation?