Learn the rein-back: how your horse steps back in a diagonal two-beat with a light hand and driving leg, without pulling on the mouth, step by step.
How do I get my horse to step back without hauling on the reins? The honest answer: not by hauling, but by driving and only limiting with the hand. According to the FEI the rein-back is a rearward diagonal movement in two-beat without a moment of suspension, in which each diagonal pair of legs is raised and returned to the ground alternately [1]. The horse should keep its desire to move forward. Calm stepping back is not submission, it is cooperation.
One study shows why the hand must be sparing: 20 warmbloods learned in the stable aisle to step back on a rein signal. The higher the rein tension and the longer it lasted, the more often the horses showed evasive behaviour with head, neck and mouth [2]. Horses that first showed other behaviours also needed longer and more pull. In the bridle the horses, given the same behaviour, responded faster and to a lighter signal than in the halter, but showed head, neck and mouth behaviour more often [2]. That shows: release and lightness are the key.
One more hint from the measurements: rein tension before a halt or transition was the strongest predictor of how high it would be during it [3]. If you are already firm on the reins before the rein-back, you have lost. A soft halt is half the way.
According to the FEI the horse should stand at the halt attentive, engaged, motionless, straight and square, with weight evenly distributed over all four legs [4]. Milestone: Your horse stands still for at least three seconds and waits for the next aid.
According to the FEI a half-halt is an almost simultaneous, coordinated action of seat, legs and hands that improves attention and balance [4]. Use it to get attention. Milestone: The horse pricks its ears and stays soft in the hand.
Drive lightly with both legs, the hand limits and does not pull. That way the horse, which may not go forward, must make one step backward. This is riding-school practice. Evasive behaviour (head up, mouth open) increased with pull strength and duration in the study [2], so it is a sign to get softer. Milestone: One calm step back without head tossing.
Give in immediately and praise. The release is the reward. The study shows the same principle: horses that stepped back correctly on the signal needed less pull [2]. Milestone: Your horse steps back on a small impulse and waits.
After the required steps the horse should according to the FEI halt square or move forward immediately [1]. For one horse length three or four steps are intended [1]. Do not let your horse stand and stick; walk on calmly. Milestone: The horse sets off after the rein-back without hopping or hurrying.
The rein-back does not replace supervised training. Practise it as an advanced rider with an instructor and only on level, safe ground. The horse may brace, rear or deviate if the pull is too strong; then release and stop. The FEI names tongue play, teeth grinding and tail swishing as possible signs of nervousness, tension or resistance [5]. If your horse repeatedly refuses to step back or shows fear, that is a reason to look for pain or discomfort, not to raise the pressure. The FEI prohibits methods that are abusive or cause fear [6].
Try the rein-back first from the ground: horse in a halter, you stand beside the shoulder and give a light, short pull. When your horse calmly makes a step, you transfer the feel into the saddle. In the study horses in the halter showed less head, neck and mouth behaviour than in the bridle but needed a stronger signal [2]. That is a hint, not proof of the best way to practise.
For one horse length the FEI requires three or four steps [1]. For beginners one or two ridden cleanly and calmly are enough at first.
Often the pull becomes too strong or too long. In one study evasive behaviour with head, neck and mouth increased with higher rein tension and longer signal duration [2]. Less pull, shorter, praise more often.
Yes: two-beat, diagonal, without suspension [1]. If it anticipates or drags the forefeet, the FEI calls that a serious fault.
Yes, and for many horses that is the first step. The study worked in the stable aisle with the halter [2]. Only transfer it to the saddle with your instructor.
It prepares the horse and improves attention and balance [4]. Because rein tension before a transition is the strongest determinant of tension in the transition [3], a soft preparation pays off.
Stretching on a Long Rein: Riding the Stretch Correctly