The Shoulder-In: The Secret Weapon for a Stronger, Straighter, and More Balanced Horse

Why the Shoulder-In Fixes So Many Things for Horses

If you’ve spent time working on your horse’s balance and strength, you’ve probably heard about the shoulder-in. It’s one of those exercises that seems simple on the surface—but in reality, it’s a powerhouse for improving your horse’s body and mind. So why does this one movement solve so many problems? Let’s break it down.

This post builds on the introduction to laterals. You can read more on this here.

What Is Shoulder-In?

Shoulder-in is a lateral movement where the horse travels forward on three tracks, with the shoulders slightly displaced inward while maintaining bend through the body. It’s not just a dressage exercise—it’s a tool for building strength, suppleness, and straightness.

Here's a video of shoulder-in under saddle:

Below is an image of what your body should be doing to ride the shoulder-in on the horse.

Why It Works

1. Engages the Hindquarters: Shoulder-in encourages the inside hind leg to step under the body, which builds strength and improves carrying power. This is essential for horses who tend to push rather than carry.

2. Improves Balance: By shifting weight slightly to the inside hind, the horse learns to balance more evenly instead of leaning on the forehand. This is a game-changer for horses who feel heavy in the hand.

3. Enhances Suppleness: The bend required in shoulder-in stretches the horse’s ribcage and loosens the muscles along the spine. This helps horses who feel stiff or resistant in one direction.

4. Straightness Through Lateral Work: Ironically, teaching a horse to move sideways helps them go straight. Shoulder-in corrects crookedness by aligning the shoulders and hindquarters, which is vital for soundness and performance.

5. Mental Focus: It’s not just physical—shoulder-in asks for coordination and attention. Horses become more tuned in to the rider’s aids, which reduces tension and improves relaxation.

Common Problems It Solves

• Heavy on the forehand

• Lack of engagement behind

• Stiffness in one direction

• Crookedness in transitions

• Difficulty maintaining rhythm and balance

Rider Tips for Success

• Start Small: Begin at the walk with a slight shoulder displacement before progressing to trot.

• Keep the Bend Soft: Avoid over-bending the neck; the bend should come from the body.

• Maintain Rhythm: If the rhythm falters, straighten and reestablish before trying again.

• Reward Often: Praise and release when your horse gives you the correct effort.

The Bottom Line

Shoulder-in isn’t just a dressage movement—it’s a foundational exercise that strengthens, balances, and connects your horse’s body and mind. If you want a horse that moves with ease, power, and harmony, shoulder-in is your secret weapon.