Side Reins

Side reins are training tools used primarily in lunging, driving, or long-line work to help a horse develop proper head and neck position and engage their hindquarters. They attach to the saddle or lunge rig on both sides and run to the horse's mouth, creating a consistent connection that encourages the horse to work in a rounded frame. When used properly, side reins help a horse understand what position you're asking for and develop the muscles needed to maintain that position. When used improperly, they can create problems—pulling the horse into an unnatural position, creating tension, or causing physical problems.

Side reins aren't intended for ridden work with a rider guiding them. They're training equipment meant to provide consistent feedback when you can't be on the horse's back to communicate directly. A lunging horse with side reins learns to engage properly without the rider's seat and leg providing feedback, which is valuable education. But a rider in the saddle has better tools for communication—your hands, seat, and legs—and side reins can interfere with that communication.

There's legitimate controversy around side reins. Some training philosophies use them extensively and consider them essential. Other philosophies avoid them entirely and develop the same skills through ridden work and other methods. Understanding side reins means understanding both how they can help and how they can create problems. The goal is to use them only when they're genuinely beneficial, and to use them correctly when you do use them.

Side reins require experience and knowledge to use safely. A poorly adjusted side rein can pull a horse into an unnatural position, creating tension that actually interferes with proper training. A side rein that's too tight restricts movement. A side rein that's too loose doesn't provide clear feedback. Getting the adjustment right requires understanding your specific horse and what you're trying to teach.

If you're considering using side reins in your training, understand their purpose, their proper use, and their limitations. Understand when they might help your horse's education and when they might create problems. And if you're unsure about using them safely, consult with an experienced trainer rather than experimenting on your own.

Side reins come in several varieties, each with different characteristics and purposes. Understanding the options helps you choose appropriate equipment if you decide to use side reins.

Fixed side reins are the simplest type—straight straps made from leather or nylon that attach to the saddle and run to the bit or cavesson. They're set to a specific length and don't have any give. Fixed reins provide consistent feedback but no flexibility, which means any resistance creates immediate tension. They're useful for horses that understand the concept and respond well to clear feedback. For horses that are learning or that get tense easily, the lack of flexibility can be problematic.

Elastic side reins incorporate rubber or elastic material that allows some give and take. The rein stretches slightly when the horse pulls, preventing sudden sharp pressure, then returns to its original length. This elasticity allows the horse some freedom of movement while still providing feedback about desired head position. Many trainers prefer elastic reins because they're less likely to create tension. The trade-off is that they're more complex and require proper maintenance of the elastic components.

Gaucho reins or draw reins are specialized equipment that can function as side reins. They typically have elastic components and a specialized design. Some trainers use them extensively in longeing, others avoid them because they can encourage incorrect head positions if not used with knowledge and care.

Long reins or long-line equipment allow the trainer to work with the horse from the ground without side reins, providing direct communication through the reins in the trainer's hands. Some trainers prefer long-line work to side-rein work because it allows for more subtle communication and less reliance on fixed equipment. Others use long reins and side reins together.

Cavesson attachments are important for proper side rein use. Rather than attaching directly to the bit, side reins should ideally attach to a cavesson—a specially fitted noseband that distributes pressure over the bridge of the nose rather than creating pressure on the bit. Some saddle rigs have built-in cavesson attachment points. Others require an additional cavesson to be fitted properly. Using a cavesson for side rein attachment is safer and more humane than attaching directly to the bit, which creates unwanted pressure in the mouth.

Bit considerations matter if side reins attach directly to the bit. A milder bit is generally preferable because side reins create constant pressure. A severe bit with side reins can create excessive pressure and discomfort. If side reins must attach to the bit, a simple snaffle is safer than a more severe bit.

Deciding whether to use side reins at all is the first question. Side reins are useful training tools for some situations but unnecessary for others. If you're doing regular ridden work, side reins are probably not needed. Ridden work gives you the ability to communicate directly with your horse using your hands, seat, and legs. Side reins are most useful in lunging or long-line work where you can't be on the horse's back providing that feedback.

Consider your horse's age and training level. A young horse still learning how to engage properly might benefit from side reins as feedback during longing. An experienced horse that already understands engagement usually doesn't need them. Horses that get tense easily might become more tense with side reins, while calm horses respond well to the consistent feedback.

Consider your training philosophy and goals. If your goal is developing a horse that responds to subtle feedback from a rider, side reins might not align with your approach. If your goal is helping a young horse understand engagement before asking a rider to sit on them, side reins might be useful. Be honest about whether you're using them because they're actually beneficial or just because you have them available.

If you decide to use side reins, choose equipment that's appropriate for your horse. Elastic reins are generally safer than fixed reins because they allow some give. Attaching to a cavesson is safer than attaching to the bit. Start with conservative adjustment rather than too tight, giving your horse a chance to understand what you're asking before applying pressure.

If you're new to using side reins, consult with an experienced trainer before using them. Learn proper adjustment, proper attach points, and how to recognize if your horse is responding well or becoming tense. Don't experiment on your own—proper use requires knowledge and experience.

Remember that side reins are tools, and like all tools, they can be used well or used poorly. Good use requires understanding and knowledge. Poor use creates problems and tension. Only use side reins if you understand how to use them correctly and if they're actually beneficial for your horse's education.

Proper adjustment of side reins is critical for both effectiveness and safety. A side rein that's adjusted too tightly pulls the horse into an unnatural position and creates tension. A side rein that's too loose doesn't provide meaningful feedback. Finding the right adjustment requires understanding your horse and what position you're asking for.

Basic adjustment principle is that the side reins should allow the horse to reach forward with their nose while still being connected. The horse should be able to move their head slightly without the side reins becoming instantly tight. When lunging, the side reins should encourage engagement and roundness but not restrict natural movement. You should see the horse's back round slightly and their hindquarters engage more actively, not resistance and tension.

Starting position is usually with side reins set longer than your intended finished length. This allows the horse to understand what you're asking without fighting excessive pressure. Once the horse responds to the equipment, you can gradually tighten the reins slightly to encourage more collection. The process is gradual—don't set them to your intended final position immediately.

The attachment points matter significantly. Attaching side reins at the appropriate location on the horse's side—not too high, not too low—ensures even pressure and natural distribution. Too-high attachment points pull the horse's head down unnaturally. Too-low attachment points can cause discomfort. Proper attachment points usually put the rein at roughly the same angle as a rider's rein would create when riding.

Asymmetry in adjustment should be avoided. Both sides should be adjusted equally unless you're specifically working to correct one-sidedness, in which case you'd work with a trainer rather than experimenting alone. Unequal side reins create uneven pressure and can cause the horse to tilt or rotate their head unnaturally.

Monitoring your horse's response is essential. If your horse becomes tense, resistant, or starts pulling against the reins, they're either telling you the adjustment is too tight or that side reins aren't right for this horse in this situation. Listen to that feedback. Increase pressure gradually if needed, but don't force a horse to accept side reins that cause tension.

Side reins require regular inspection and maintenance to function properly and safely. Leather side reins should be cleaned after each use to remove sweat and dirt. Once clean and dry, apply leather conditioner periodically to keep the leather supple. Inspect them for cracks, separation, or damage. Damaged leather side reins should be repaired or replaced because they might fail during use.

Elastic components in elastic side reins need particular attention. Check the elastic regularly for deterioration or loss of elasticity. Elastic that's lost its stretch doesn't provide the feedback it's supposed to provide and defeats the purpose of using elastic reins. Replace elastic components when they no longer bounce back properly. Store elastic reins in a cool location away from direct sunlight, which damages rubber and elastic materials.

Nylon side reins should be cleaned and dried after use, especially if exposed to sweat. Check them for fraying or damage. Unlike leather, nylon can usually withstand more aggressive cleaning. Ensure that attachment points—snaps, clips, or buckles—function properly and don't show damage or weakness.

Cavesson attachments should be checked regularly for proper fit and function. If your side reins attach to a cavesson, ensure the cavesson fits your horse properly without rubbing or causing sores. The cavesson noseband should be snug but comfortable, not tight enough to restrict breathing.

Bit attachments, if used, should be checked frequently. A bit that's becoming loose or showing damage should be addressed immediately. Never use damaged tack that might fail during use.

Store side reins clean and dry. Don't leave them hanging in the sun or in damp conditions. Don't leave them crumpled in a tack box where they'll develop kinks or damage. Proper storage preserves the equipment and keeps it ready to use.

Before buying side reins, be clear about whether you actually need them. Don't buy equipment just because you have it available or because someone recommended it. Understand the purpose and whether it's actually beneficial for your horse before investing.

When buying side reins, choose quality materials over cheap options. Leather side reins are usually more durable and comfortable than poor-quality synthetic materials. Elastic side reins made with good rubber components function better than cheap versions made with inferior materials. Investing in quality equipment that will last is smarter than buying cheap equipment that needs replacing frequently.

Choose elastic side reins over fixed reins if you're uncertain. Elasticity provides some forgiveness if the adjustment isn't perfect and is less likely to create tension. Fixed reins require more precise adjustment and knowledge to use safely.

Buy from reputable tack sources that stand behind their products. Ensure equipment meets safety standards and is appropriate for your horse. Ask questions if you're unsure about proper use or adjustment.

Start conservatively if using side reins for the first time. Buy a single pair and use them for specific longeing sessions rather than using them constantly. See how your horse responds before committing to more extensive use. If your horse responds well and you see benefits, you can continue using them. If your horse becomes tense or seems uncomfortable, stop using them rather than forcing the issue.

Consider hiring a trainer to teach you how to use side reins properly if you're going to use them. A trainer can show you proper adjustment, how to recognize when your horse is responding correctly versus tensing, and when to increase or decrease pressure. This investment in knowledge prevents mistakes that could harm your horse.

Final recommendation: Only use side reins if they're genuinely beneficial for your training goals. Use them correctly with proper adjustment and attachment. Monitor your horse's response carefully. If your horse becomes tense or seems uncomfortable, stop using them. Side reins are tools that can help with specific training situations, but they're not necessary for developing good horses. If you're uncertain about using them, there are alternative methods that work just as well.