Dressage is often described as “ballet on horseback.” While the horse is performing high-level athletics, the rider’s job is to remain asymmetrically still. You aren’t just sitting; you are using your body as a fine-tuned instrument to communicate through “invisible” aids.

In dressage, the Deep Front Line and the Arm Lines are the governors of the “connection.”

1. The “Deep Seat”: The Deep Front Line (DFL)

A dressage rider must have a “following seat”—your pelvis must move with the horse’s back while your upper body remains perfectly vertical.

• The Action: The DFL (inner thighs, psoas, and diaphragm) is the “control center.” You use your adductors not to “clamp,” but to “drape” around the horse.
• The Benefit: A “live” DFL allows you to sit deep into the saddle and absorb the horse’s movement through your core rather than bouncing.
• The Risk: Because you are constantly “opening” the hips, the psoas can become chronically tight in a lengthened state, or the pelvic floor can become over-active. This leads to that “hollow back” feeling where your lower spine feels jammed.

2. The “Elastic Contact”: The Arm Lines

The “connection” to the horse’s mouth must be steady yet soft—like holding a wet sponge.

• The Action: You use the Deep Back Arm Line (triceps and the muscles under the armpit) to “plug” your elbows into your lats.
• The Benefit: This allows your hands to remain independent of your body’s movement. Your arms act like “shocks” on a car.
• The Risk: If you “pull” with your biceps (Front Arm Line), you lock your elbows and shoulders. This “tethers” your neck, causing the horse to feel a “dead” weight and causing you to have constant tension in your upper traps and neck.

3. The “Vertical Axis”: The Superficial Back Line (SBL)

To maintain the “Dressage Pose” (ears, shoulders, hips, and heels in a straight line), the SBL is under constant work.

• The Action: The SBL (heels to brow) keeps you upright against the forward momentum of the horse.
• The Result: The constant “heels down” position keeps the calves and hamstrings in a state of high tension.
• The Risk: This tension travels straight up to the base of the skull. This is why many dressage riders suffer from “concentration headaches”—the SBL is being pulled tight from the heels all the way to the eyebrows.

4. The “Invisible Aid”: The Spiral Line (SL)

Turning a dressage horse involves a subtle “rotation” of the rider’s ribcage.

• The Action: The Spiral Line allows you to turn your shoulders 5 degrees without moving your hips.
• The Benefit: This subtle twist tells the horse to bend around your inside leg.
• The Risk: If your SL is “glued,” you will lean into the turn instead of rotating. This shifts your weight to the wrong side of the saddle, “tripping up” the horse’s rhythm and making your circles look like ovals.

The “Post-Ride” Dressage Reset

Do these after you dismount to “un-mold” from the vertical pose.

1. The “Psoas Release” (DFL): Lay on your back on a tack trunk or the tailgate of your truck with your tailbone at the edge. Hug one knee to your chest and let the other leg hang off.
2. • Why: It “unzips” the deep hip flexors that have been working to stabilize your seat for an hour.
2. The “Wall-Clock” Rotation (Spiral Line): Stand sideways to a wall, place your hand on it, and slowly rotate your chest away while keeping your feet planted.
3. • Why: It restores the ribcage mobility needed for those subtle “turning aids.”
3. The “Elbow Drop” (Arm Lines): Reach your arms behind your back, interlace your fingers, and focus on pulling your elbows down toward your back pockets.
4. • Why: It un-tethers the neck from the “holding” position of the reins.

Summary for the Dressage Rider