This article was translated using AI.
Key Takeaways:
- The hindquarters are the horse's engine and generate the thrust for forward movement
- Active stepping under of the hind legs towards the center of gravity is a prerequisite for the healthy carrying of the rider
- Without active hindquarters, the horse remains heavy on the forehand and develops signs of wear and tear on the front legs
- Engagement of the haunches relieves the forehand and enables collection and higher-level movements
- The activation of the hindquarters is achieved through gymnastic exercises, not through constant driving
The Hindquarters as the Engine
If you want to simplify the biomechanics of the horse, you could say: the hindquarters are the engine, the forehand is the chassis. The power for forward movement comes from the hindquarters. The powerful muscles of the croup, upper thigh, and lower thigh generate the thrust that drives the horse forward. The front legs, on the other hand, primarily have a supporting and cushioning function.
This division of roles is already present in a free-roaming horse without a rider. However, as soon as a rider mounts, the situation shifts. The additional weight on the back shifts the center of gravity backwards and upwards. Theoretically, this should mean that the hindquarters take on more load. In reality, however, the opposite often happens: many horses react to the rider's weight by "fleeing" onto the forehand and placing their hind legs further back instead of bringing them under the center of gravity.
A horse that moves this way uses its hindquarters only as a pusher, not as a carrier. The hind legs push off and shove the horse forward but do not take on any load. The entire load – the weight of the horse plus the weight of the rider – must be carried by the forehand. This inevitably leads to overloading the front legs, problems with joints, tendons, and hooves, and a horse that cannot work through its back.
Stepping Under and Weight Bearing
The goal of every correct training session is to activate the hindquarters – to get them to not just push, but also to take on weight. This happens when the hind legs step further under the center of gravity. This is referred to as "stepping under" of the hind legs.
When the hind leg steps under the center of gravity, the entire biomechanics change. The pelvis tilts slightly, the lumbar spine is activated, the abdominal muscles contract, and the ribcage rises. The back can arch, and the load is carried from the rear instead of just from the front. The forehand is relieved, the shoulders can swing more freely, and the horse can carry itself (and the rider) in balance.
This stepping under is not just a matter of stride length, but also a matter of flexion. An actively stepping hind leg flexes in the joints – in the hip joint, the stifle, and the hock. This flexion allows the leg to take on weight. The more the hind leg steps under the center of gravity and flexes in the process, the more load it can take over and the more the forehand is relieved.
What Happens Without Active Hindquarters
A horse without active hindquarters moves on the forehand. You can see it clearly: the horse feels heavy in the hand, the shoulders are held tight, and the strides are short and flat. The horse stumbles more often, has difficulty with transitions, and cannot collect. The back remains low or even becomes hollow because the abdominal muscles are not activated.
The health consequences are serious. The front legs permanently carry too much weight. The joints – coffin joint, fetlock joint, carpal joint – are overloaded and develop osteoarthritis. The tendons, especially the flexor tendons, are overstrained and prone to inflammation and tendon damage. The hooves are loaded unevenly, which can lead to problems such as navicular disease, hoof cracks, or contracted hooves.
The back also suffers. Without the activity of the hindquarters, the trunk-supporting muscles cannot develop properly. The ribcage sags, the back muscles become tense, and over time the horse develops carrying exhaustion. The spine is incorrectly loaded, the spinous processes come closer together, and there is a risk of Kissing Spines.
In the long run, the lack of hindquarters activity leads to a prematurely worn-out horse. While the hindquarters remain underdeveloped and weak, the front legs are so damaged after a few years that the horse goes lame or is no longer ridable. This is not a rarity, but unfortunately the sad reality for many riding horses.
Exercises for More Engagement of the Haunches
The good news is: the hindquarters can be trained. There are numerous exercises that encourage the hind legs to step further under the center of gravity and take on more weight. It is important that these exercises have a gymnastic effect and that the horse is not simply driven forward. Running faster does not automatically mean more hindquarters activity – on the contrary, many rushed horses push their hind legs even further back.
Transitions between gaits are one of the best exercises for the hindquarters. During a transition from trot to walk or from canter to trot, the hind legs must step under the center of gravity and absorb the weight. This increased weight-bearing trains the flexion of the haunches. Frequent transitions are particularly effective: trot – walk – trot – walk, alternating every few strides. This challenges the hindquarters without overloading them.
Transitions within a gait are also valuable. From working trot to collected trot and back, from medium walk to collected walk. These differences in tempo require an active hindquarters that must adapt and take on more or less load.
Rein-back is an excellent exercise for haunch flexion. During the rein-back, the hind legs must take on load and push the body backward, which requires a strong flexion of the haunches. However, this exercise should only be used once the horse already shows a certain degree of collection, as incorrect rein-back does more harm than good.
Lateral movements such as shoulder-in, travers, and renvers are classic lessons for activating the hindquarters. In the shoulder-in, the inner hind leg must step increasingly under the center of gravity and take on weight. In travers and renvers, the hindquarters are displaced sideways, which also leads to more flexion and weight-bearing. These lessons should be ridden in all three gaits.
Cavaletti and pole work challenge the hindquarters in a natural way. The horse must lift its legs higher, flex more, and place its feet more precisely. This activates the muscles and improves coordination. Walking over poles is a good basic exercise even for young or untrained horses.
Uphill work is biomechanically ideal for strengthening the hindquarters. When walking uphill, the hind legs must generate significantly more thrust and take on more load. The muscles are strengthened, and the horse automatically learns to flex the haunches. However, one should be careful when riding downhill, as this places a heavy load on the forehand.
© Adobe Stock / Talitha
Don't Confuse: Driving vs. Activating
A common mistake is to confuse constant driving with hindquarters activation. Many riders drive permanently with the leg, hoping to activate the hindquarters. What actually happens is that the horse becomes dull and hurried without the hind legs actually stepping under the center of gravity.
True activation of the hindquarters does not come from constant driving, but from short, precise impulses at the right moment, combined with correct balance and the right selection of exercises. A well-trained horse should be active by itself and only occasionally need a reminder. Constant driving is a sign that something is wrong – either the horse is not yet sufficiently trained, or there are problems with balance, suppleness, or health.
Activation also comes not only from the leg but from the entire seat. A rider's back that swings with the movement and supports the horse's pelvis activates the hindquarters much more effectively than constant leg driving. Weight aids also play a major role: by specifically shifting weight, the rider can encourage the horse to load a specific hind leg more.
Haunch Flexion and Collection
The further a horse progresses in its training, the more weight the hindquarters must be able to take over. In collected movements such as piaffe, passage, or steep half-passes, haunch flexion becomes maximal. The hind legs step far under the center of gravity, the joints flex strongly, and the hindquarters carry the majority of the load.
This high level of collection is only possible if the muscles of the hindquarters have been systematically built up over years. The muscles of the croup, upper thigh, and lower thigh must be strong enough to carry this load. The joints must be mobile and the tendons resilient. A horse that is collected too strongly too early, without the physical prerequisites being met, will suffer damage.
Therefore, the training of the hindquarters is a long-term process. You start with simple exercises that promote stepping under and slowly increase the demands. Haunch flexion increases gradually over months and years, and the musculature develops in parallel. Patience is the key here – a rushed training leads to overloading, injuries, and long-term damage.
The Health Benefits
A horse with well-trained, active hindquarters is a healthy horse. The forehand is relieved, which protects the joints, tendons, and hooves. The back can swing and arch, which prevents back problems. The entire statics of the body are balanced, leading to even, healthy wear rather than one-sided overloading.
A horse with active hindquarters also moves more efficiently. It needs less energy for the same performance because the biomechanics are optimized. It tires less quickly and can work longer without becoming tense. The movements are smoother, more elastic, and more expressive.
Last but not least, an active hindquarters makes riding safer. A horse that carries itself and does not move on the forehand stumbles less, can stop better, and is more maneuverable in critical situations. Balance and coordination are better, which reduces the risk of injury for both horse and rider.
The Hindquarters as an Investment
Working on the hindquarters is an investment in the horse's future. Every training session in which you consciously work on activating the hindquarters pays off in the long run. The horse will stay healthier, remain ridable longer, and enjoy movement well into old age.
The path there requires patience, consistency, and knowledge. You have to understand how biomechanics work, which exercises make sense, and how to recognize whether the hindquarters are really working or just pushing. With the right approach and enough time, however, an active, powerful hindquarters can be developed in any healthy horse – thereby creating the basis for a long, healthy horse life.
