Essential anatomy: what actually gets injured
A horse's limbs are an engineering marvel: they transmit enormous forces through thin, light structures. The superficial digital flexor tendon (SDFT) and the deep digital flexor tendon (DDFT) are the structures most frequently involved in sport-horse injuries. They run along the back of the cannon, wrapped in synovial sheaths that lubricate and protect them.
Ligaments, on the other hand, serve a passive stabilising function. The suspensory ligament of the fetlock — which runs from the palmar side of the cannon bone to the sesamoid bones — is particularly vulnerable in jumpers and racehorses. Its distinctive feature is that it recovers more slowly than tendons, making prevention essential.
Unlike muscle, tendons and ligaments receive a poor blood supply. This means that once injured, the healing process is slow and the risk of recurrence is high. In this context, prevention has enormous value compared with treatment.
Warning signs you should not ignore
The horse cannot speak, but its body communicates a great deal. Learning to read the early signs of tendon stress can make the difference between a two-week preventive rest and a six-month recovery.
- Localised heat: run the back of your hand along the cannon right after work. An area that is warmer than the others deserves attention.
- Spindle-shaped swelling: a swelling centred on the tendon, even a mild one, should never be underestimated. It must be distinguished from generalised post-training oedema.
- Pain on palpation: press gently along the path of the SDFT. The horse should not react by flinching or pulling away.
- Variable lameness: a lameness that appears only on hard ground or only at certain gaits is often the first sign of a developing tendon problem.
- Change in stride: a horse that shortens its stride or avoids certain movements is already adopting a compensatory strategy.
The preventive routine: what to do every day
Tendon prevention is not a single event, but a series of daily habits. Here are the pillars of an effective routine:
- Progressive warm-up: at least 10–15 minutes of active walk before asking for work at the trot or canter. Cold tendons are far less elastic.
- Post-work cool-down: 10 minutes of walk to clear lactic acid and promote lymphatic drainage before returning to the stall.
- Systematic palpation: every day, after the cool-down. It will become automatic within a few weeks.
- Clay pack application: ArgiStrong or ClayPower Arnica on the limbs after every work session. The clay mineralises the tissues, promotes drainage and maintains the optimal temperature.
- Adequate rest: tendons repair and strengthen during rest. A chronically under-recovered horse accumulates micro-injuries.
The role of the clay pack in prevention
The mineral clay pack is not just a product for post-injury recovery: it is a first-rate preventive tool. Nocera Umbra clay acts on tendons and ligaments through three main mechanisms:
- Tissue mineralisation: silica, magnesium and calcium are released by osmosis into the superficial tissues, strengthening the structure of the tendon sheath.
- Heat reduction: the clay absorbs the excess heat produced by microtrauma, limiting the local inflammatory cascade.
- Fluid drainage: the osmotic effect reduces interstitial oedema, keeping the tissues more compact and less vulnerable.
“I started using ArgiStrong as a preventive routine three years ago. Since then, not a single tendon injury in my group of horses. I don't know if it's thanks to the clay pack alone, but it's part of a system that works.” — Valentina C., federal instructor
Seasonal notes: summer and winter
Summer: hard ground significantly increases tendon risk. Consider reducing the volume of high-intensity work during the hottest hours and increasing the frequency of clay pack applications. Tendons stressed by ambient heat struggle to dissipate heat from exertion.
Winter: the main risk is working a cold horse in harsh conditions. The warm-up becomes even more important. Apply the clay pack before work (and remove it) to pre-condition the tissues, then again after the session for recovery.