Balance Exercise with the Reins: Switching between long reins and collected reins is a more advanced exercise that trains the horse to transition from a relaxed state to a more engaged and balanced posture.In the beginning, when we take up the reins, the horse will often tense its neck and lift its head and neck. A tense, high neck causes the ribcage to drop, leading to a hollow back. Initially, the horse lifts its neck and tenses because this is more intuitive than engaging the underneck muscles, tilting the pelvis, and lifting the forehand up and forward.
When a horse tenses its neck, it is crucial not to try forcing it to yield by increasing rein pressure or using alternating rein aids. This will not help the horse relax and stretch forward through the entire neck. Instead, it will reinforce the incorrect posture.
We teach the horse to yield and relax its entire neck by working with an extremely light contact on the reins.