03/07/2025
Lets talk about the thoracic sling !
* The horses forelimbs are an upright bony column which is connected to the spine via the thoracic sling. There is no bony attachment so this sling of muscles supports the weight of the thorax and body between the front limbs.
* The muscles involved are the ventral serrated muscle thoracic and cervical, Subclavian, descending, transverse and ascending pectoral.
* These powerful postural muscles stabilise the shoulder and elbow and attach the scapula to the withers, spine and ribs.
*They enable the scapulae to glide over the ribs and trunk and allows the body to move between the scapulae so it can roll into a turn at speed and dissipate concussive forces.
* The sling supports the weight contributes to balance, turning and braking.
* Strengthening the thoracic sling will shorten the muscles and lift the thorax between the forelimbs and gives the impression the horse has grown.
Weakness in the thoracic sling can lead to many issues here are a few -
* Going on the forehand
* Difficulty bending, turning, lateral movements
* Reduced stride length
* Girthy
* Pulling along rather than pushing from behind
* Heavy in the hand
* Would rather adopt a hollow outline with a high head position and struggling to maintain good balance.
* Falling in
* Performance issues such as tiring more quickly
Here are some of the ways to recognise it your horses posture -
* A downhill posture
* A dip int he neck in front of the withers
* A pronounced and slack looking set of pectoral muscles
* A hollow behind the withers and shoulder
* Elbows angled outwards
What can you do?
* Raised walk pole work , this encourages the horse to use the thoracic sling, lift its legs, stretch its head sown and out.
* Up hill work engages the thoracic sling muscles, in hand or ridden and it doesn't need to fast either. Walking engages the muscles to.
* Backing up, ideally on a daily basis, encouraging the horses head to lower.
* When the horse is ready lateral work when riding such as leg yield or shoulder in strengthen the sling.
What can I do?
* I can assess you horse and establish if it it a thoracic sling weakness.
* Help rule out pain and any other body or compensatory issues.
* Relieve any muscle soreness and tension with the thoracic sling muscles ( often most noticeable in the transverse and ascending pectorals when girthing).
* Advice exercises tailored to your horses specific needs.